chore: replace doc-ready with defer (#18991)

Replace using `async` with `defer` to allow parallel download of
JavaScript without blocking the parser.
Now script will run after DOM is parsed.

Refs: https://html.spec.whatwg.org/multipage/scripting.html#attr-script-defer
Refs: https://caniuse.com/script-defer

---------

Signed-off-by: Mike Fiedler <miketheman@gmail.com>

Author: miketheman

warehouse/locale/messages.pot

@@ -983,14 +983,14 @@ msgstr ""
 
 #: warehouse/templates/404.html:30 warehouse/templates/500.html:18
 #: warehouse/templates/accounts/two-factor.html:35
-#: warehouse/templates/base.html:342 warehouse/templates/base.html:348
-#: warehouse/templates/base.html:354 warehouse/templates/base.html:360
-#: warehouse/templates/base.html:376 warehouse/templates/base.html:382
-#: warehouse/templates/base.html:407 warehouse/templates/base.html:413
-#: warehouse/templates/base.html:422 warehouse/templates/base.html:435
-#: warehouse/templates/base.html:444 warehouse/templates/base.html:450
-#: warehouse/templates/base.html:456 warehouse/templates/base.html:469
-#: warehouse/templates/base.html:486
+#: warehouse/templates/base.html:343 warehouse/templates/base.html:349
+#: warehouse/templates/base.html:355 warehouse/templates/base.html:361
+#: warehouse/templates/base.html:377 warehouse/templates/base.html:383
+#: warehouse/templates/base.html:408 warehouse/templates/base.html:414
+#: warehouse/templates/base.html:423 warehouse/templates/base.html:436
+#: warehouse/templates/base.html:445 warehouse/templates/base.html:451
+#: warehouse/templates/base.html:457 warehouse/templates/base.html:470
+#: warehouse/templates/base.html:487
 #: warehouse/templates/includes/accounts/profile-callout.html:17
 #: warehouse/templates/includes/file-details.html:129
 #: warehouse/templates/index.html:98 warehouse/templates/index.html:105
@@ -1144,7 +1144,7 @@ msgid "Main navigation"
 msgstr ""
 
 #: warehouse/templates/base.html:33 warehouse/templates/base.html:68
-#: warehouse/templates/base.html:337
+#: warehouse/templates/base.html:338
 #: warehouse/templates/includes/current-user-indicator.html:77
 #: warehouse/templates/pages/help.html:209
 #: warehouse/templates/pages/sitemap.html:19
@@ -1220,16 +1220,16 @@ msgstr ""
 msgid "RSS: 40 newest packages"
 msgstr ""
 
-#: warehouse/templates/base.html:208
+#: warehouse/templates/base.html:209
 msgid "Skip to main content"
 msgstr ""
 
-#: warehouse/templates/base.html:212
+#: warehouse/templates/base.html:213
 msgid "Switch to mobile version"
 msgstr ""
 
-#: warehouse/templates/base.html:219 warehouse/templates/base.html:228
-#: warehouse/templates/base.html:238
+#: warehouse/templates/base.html:220 warehouse/templates/base.html:229
+#: warehouse/templates/base.html:239
 #: warehouse/templates/includes/flash-messages.html:41
 #: warehouse/templates/includes/session-notifications.html:19
 #: warehouse/templates/manage/account.html:845
@@ -1246,177 +1246,177 @@ msgstr ""
 msgid "Warning"
 msgstr ""
 
-#: warehouse/templates/base.html:221
+#: warehouse/templates/base.html:222
 msgid "You are using an unsupported browser, upgrade to a newer version."
 msgstr ""
 
-#: warehouse/templates/base.html:230
+#: warehouse/templates/base.html:231
 msgid ""
 "You are using TestPyPI – a separate instance of the Python Package Index "
 "that allows you to try distribution tools and processes without affecting"
 " the real index."
 msgstr ""
 
-#: warehouse/templates/base.html:240
+#: warehouse/templates/base.html:241
 msgid ""
 "Some features may not work without JavaScript. Please try enabling it if "
 "you encounter problems."
 msgstr ""
 
-#: warehouse/templates/base.html:275 warehouse/templates/base.html:307
+#: warehouse/templates/base.html:276 warehouse/templates/base.html:308
 #: warehouse/templates/error-base-with-search.html:8
 #: warehouse/templates/index.html:29
 msgid "Search PyPI"
 msgstr ""
 
-#: warehouse/templates/base.html:280 warehouse/templates/index.html:35
+#: warehouse/templates/base.html:281 warehouse/templates/index.html:35
 msgid "Type '/' to search projects"
 msgstr ""
 
-#: warehouse/templates/base.html:291 warehouse/templates/base.html:320
+#: warehouse/templates/base.html:292 warehouse/templates/base.html:321
 #: warehouse/templates/error-base-with-search.html:19
 #: warehouse/templates/index.html:44
 msgid "Search"
 msgstr ""
 
-#: warehouse/templates/base.html:312
+#: warehouse/templates/base.html:313
 #: warehouse/templates/error-base-with-search.html:13
 msgid "Search projects"
 msgstr ""
 
-#: warehouse/templates/base.html:338
+#: warehouse/templates/base.html:339
 msgid "Help navigation"
 msgstr ""
 
-#: warehouse/templates/base.html:344
+#: warehouse/templates/base.html:345
 msgid "Installing packages"
 msgstr ""
 
-#: warehouse/templates/base.html:350
+#: warehouse/templates/base.html:351
 msgid "Uploading packages"
 msgstr ""
 
-#: warehouse/templates/base.html:356
+#: warehouse/templates/base.html:357
 msgid "User guide"
 msgstr ""
 
-#: warehouse/templates/base.html:362
+#: warehouse/templates/base.html:363
 msgid "Project name retention"
 msgstr ""
 
-#: warehouse/templates/base.html:365
+#: warehouse/templates/base.html:366
 msgid "FAQs"
 msgstr ""
 
-#: warehouse/templates/base.html:371 warehouse/templates/pages/sitemap.html:34
+#: warehouse/templates/base.html:372 warehouse/templates/pages/sitemap.html:34
 msgid "About PyPI"
 msgstr ""
 
-#: warehouse/templates/base.html:372
+#: warehouse/templates/base.html:373
 msgid "About PyPI navigation"
 msgstr ""
 
-#: warehouse/templates/base.html:378
+#: warehouse/templates/base.html:379
 msgid "PyPI Blog"
 msgstr ""
 
-#: warehouse/templates/base.html:384
+#: warehouse/templates/base.html:385
 msgid "Infrastructure dashboard"
 msgstr ""
 
-#: warehouse/templates/base.html:387 warehouse/templates/pages/sitemap.html:40
+#: warehouse/templates/base.html:388 warehouse/templates/pages/sitemap.html:40
 #: warehouse/templates/pages/stats.html:4
 msgid "Statistics"
 msgstr ""
 
-#: warehouse/templates/base.html:390
+#: warehouse/templates/base.html:391
 msgid "Logos & trademarks"
 msgstr ""
 
-#: warehouse/templates/base.html:393
+#: warehouse/templates/base.html:394
 msgid "Our sponsors"
 msgstr ""
 
-#: warehouse/templates/base.html:399
+#: warehouse/templates/base.html:400
 msgid "Contributing to PyPI"
 msgstr ""
 
-#: warehouse/templates/base.html:400
+#: warehouse/templates/base.html:401
 msgid "How to contribute navigation"
 msgstr ""
 
-#: warehouse/templates/base.html:403
+#: warehouse/templates/base.html:404
 msgid "Bugs and feedback"
 msgstr ""
 
-#: warehouse/templates/base.html:409
+#: warehouse/templates/base.html:410
 msgid "Contribute on GitHub"
 msgstr ""
 
-#: warehouse/templates/base.html:415
+#: warehouse/templates/base.html:416
 msgid "Translate PyPI"
 msgstr ""
 
-#: warehouse/templates/base.html:418
+#: warehouse/templates/base.html:419
 msgid "Sponsor PyPI"
 msgstr ""
 
-#: warehouse/templates/base.html:424
+#: warehouse/templates/base.html:425
 msgid "Development credits"
 msgstr ""
 
-#: warehouse/templates/base.html:430 warehouse/templates/pages/sitemap.html:10
+#: warehouse/templates/base.html:431 warehouse/templates/pages/sitemap.html:10
 msgid "Using PyPI"
 msgstr ""
 
-#: warehouse/templates/base.html:431
+#: warehouse/templates/base.html:432
 msgid "Using PyPI navigation"
 msgstr ""
 
-#: warehouse/templates/base.html:437
+#: warehouse/templates/base.html:438
 #: warehouse/templates/manage/organization/activate_subscription.html:21
 msgid "Terms of Service"
 msgstr ""
 
-#: warehouse/templates/base.html:440
+#: warehouse/templates/base.html:441
 msgid "Report security issue"
 msgstr ""
 
-#: warehouse/templates/base.html:446
+#: warehouse/templates/base.html:447
 msgid "Code of conduct"
 msgstr ""
 
-#: warehouse/templates/base.html:452
+#: warehouse/templates/base.html:453
 msgid "Privacy Notice"
 msgstr ""
 
-#: warehouse/templates/base.html:458
+#: warehouse/templates/base.html:459
 msgid "Acceptable Use Policy"
 msgstr ""
 
-#: warehouse/templates/base.html:468
+#: warehouse/templates/base.html:469
 msgid "Status:"
 msgstr ""
 
-#: warehouse/templates/base.html:472
+#: warehouse/templates/base.html:473
 msgid "all systems operational"
 msgstr ""
 
-#: warehouse/templates/base.html:476
+#: warehouse/templates/base.html:477
 msgid ""
 "Developed and maintained by the Python community, for the Python "
 "community."
 msgstr ""
 
-#: warehouse/templates/base.html:478
+#: warehouse/templates/base.html:479
 msgid "Donate today!"
 msgstr ""
 
-#: warehouse/templates/base.html:490 warehouse/templates/pages/sitemap.html:4
+#: warehouse/templates/base.html:491 warehouse/templates/pages/sitemap.html:4
 msgid "Site map"
 msgstr ""
 
-#: warehouse/templates/base.html:497
+#: warehouse/templates/base.html:498
 msgid "Switch to desktop version"
 msgstr ""