style: update web app metadata and colors

- Updated title to "Headlines Toolkit"
- Changed colors to #FFFFFF

Author: fulleni

flutter_launcher_icons.yaml

@@ -18,5 +18,5 @@ flutter_launcher_icons:
   web:
     generate: true
     # image_path: "assets/icon/headlines_toolkit.png"
-    background_color: "#fcfcfc"
-    theme_color: "#fcfcfc"
+    background_color: "#FFFFFF"
+    theme_color: "#FFFFFF"

web/index.html

@@ -27,7 +27,7 @@
   <!-- Favicon -->
   <link rel="icon" type="image/png" href="favicon.png">
 
-  <title>Ht Main</title>
+  <title>Headlines Toolkit</title>
   <link rel="manifest" href="manifest.json">
   <style id="splash-screen-style">
     html {

web/manifest.json

@@ -3,8 +3,8 @@
     "short_name": "Headlines Toolkit",
     "start_url": ".",
     "display": "standalone",
-    "background_color": "#fcfcfc",
-    "theme_color": "#fcfcfc",
+    "background_color": "#FFFFFF",
+    "theme_color": "#FFFFFF",
     "description": "Develop News Headlines Apps Rapidly & Reliably.",
     "orientation": "portrait-primary",
     "prefer_related_applications": false,