Add tooling for code coverage, changelogs, and conventional commits

[westeezy]

• Rename LICENSE.txt -> LICENSE
• Add CodeCov
• Add README Badges
• Add standard-version and commitlint
• Upgrade to grumbler-scripts v5
• Fix new lint issues. Mostly ignoring to avoid prod impact.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #54   +/-   ##
=======================================
  Coverage        ?   69.34%           
=======================================
  Files           ?        5           
  Lines           ?      137           
  Branches        ?        0           
=======================================
  Hits            ?       95           
  Misses          ?       42           
  Partials        ?        0           

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