ci: add pr naming workflow

[scottgerring]

Changes

Adds a workflow to ensure that PR names conform to the conventional commits standard. This will make our commit history going forward consistent, and will (hopefully!) make it easier to generate changelogs at a later stage.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.3%. Comparing base (64549d7) to head (45a5b9b).
Report is 2 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2698   +/-   ##
=====================================
  Coverage   79.3%   79.3%           
=====================================
  Files        123     123           
  Lines      22660   22660           
=====================================
  Hits       17977   17977           
  Misses      4683    4683           

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[lalitb]

LGTM, with couple of comments.

[scottgerring]

@lalitb @cijothomas addressed comments; should be good to merge.