Port before_v0.60 parse_aws_s3_ls.nu (#1086)

Tested with https://docs.aws.amazon.com/cli/latest/reference/s3/ls.html
example output

Note that the script has a placeholder parameter
`s3://your-bucket-and-path`. The script is moved into the `sourced`
folder like all the other ported scripts from the cool_oneliners folder
before it, but sourcing it as-is is not meaningful.

This ports the last file in `before_v0.60`, consequently resolving #221.

Author: Kissaki

before_v0.60/cool_oneliners/parse_aws_s3_ls.nu

@@ -0,0 +1,3 @@
+# transform the aligned text output of aws s3 ls into something useful
+# presumes you have the aws CLI
+aws s3 ls s3://your-bucket-and-path | lines | each { str replace '  ' ' ' | str replace '  ' ' ' } | split column ' '