[v2] Optimize gifs packaged with vsce to reduce file size

[t1m0thyj]

What It Does

Shrinks the size of GIFs in the repo by lossless optimizing them with gifsicle:
for gif in $(find packages/vsce/docs/images -name '*.gif'); do gifsicle -b -O3 $gif; done

How to Test

Review Checklist
I certify that I have:

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

Additional Comments

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (main@49aadd9). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #130   +/-   ##
=======================================
  Coverage        ?   93.28%           
=======================================
  Files           ?       74           
  Lines           ?      760           
  Branches        ?       94           
=======================================
  Hits            ?      709           
  Misses          ?       51           
  Partials        ?        0           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[github-actions]

Version info from a repo admin is required to publish a new version. Please add one of the following labels within 30 minutes:

• release-current: 5.0.6 (default)
• release-patch: 5.0.7
• release-minor: 5.1.0

_{Powered by Octorelease 🚀}

[github-actions]

Release failed for the main branch. 😢

HttpError: invalid json response body at https://api.github.com/repos/zowe/cics-for-zowe-client/issues/130/events?per_page=100 reason: Unexpected end of JSON input
    at /home/runner/work/_actions/zowe-actions/octorelease/v1/dist/github.js:4880:15
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

Check the workflow run for more error details.

_{Powered by Octorelease 🚀}