Add CI Failure Advisor

[zinwang]

Resolves #796

[zinwang]

If the failed CI workflow is triggered by a pull request,
the advisor will post the report as a comment under that PR like this.
Otherwise, the advisor will create an issue containing the report like this.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.94%. Comparing base (57e94f3) to head (009abd8).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #797   +/-   ##
=======================================
  Coverage   80.94%   80.94%           
=======================================
  Files          75       75           
  Lines        6308     6308           
=======================================
  Hits         5106     5106           
  Misses       1202     1202           

Flag	Coverage Δ
unittests	80.94% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.