[repo] Switch to component label for tagging issues

[reyang]

Instead of using the unclear "area", switch to component name (NuGet package name).
Apply the component labels to feature request as optional.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.71%. Comparing base (6250307) to head (517f5d9).
Report is 222 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5612      +/-   ##
==========================================
+ Coverage   83.38%   85.71%   +2.32%     
==========================================
  Files         297      254      -43     
  Lines       12531    10982    -1549     
==========================================
- Hits        10449     9413    -1036     
+ Misses       2082     1569     -513     

Flag	Coverage Δ
unittests	?
unittests-Solution-Experimental	85.40% <ø> (?)
unittests-Solution-Stable	85.70% <ø> (?)
unittests-Unstable-Core	19.85% <ø> (?)

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

see 113 files with indirect coverage changes

[CodeBlanch]

LGTM