Fix issues badge, update doc to remove web folder reference

[davenice]

What It Does
Updates the readme to...

• Fix the issues badge
• Add a code coverage badge
• Remove the reference to the web folder (doc catch up for Flattened Web resources #257) ... this was already mentioned in the change-log so I don't believe we need to change-log this

Updates the PR template to remind people to check the doc.

None of this affects the released product so there will be no need to ship a new version at this point.

Review Checklist
I certify that I have:

• tested my changes
• added/updated automated tests
• updated the changelog
• followed the contribution guidelines

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.02%. Comparing base (c079d4c) to head (1d2e4bf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #260   +/-   ##
=======================================
  Coverage   41.02%   41.02%           
=======================================
  Files         153      153           
  Lines        5206     5206           
  Branches      884      883    -1     
=======================================
  Hits         2136     2136           
  Misses       3070     3070           

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[AndrewTwydell]

Nice GIF removal!!

[enamkhan]

LGTM!

[github-actions]

Release succeeded for the main branch. 🎉

The following packages have been published:

• vsce: [email protected]
• vsce: [email protected] (OVSX)

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