Change Git hooks to be optional

[Mrtenz]

This changes Git hooks to be opt-in by running yarn setup. This is an attempt to fix Dependabot, which seems to be having issues again. This is just a guess at this point though, since the logs don't provide much information about what's going on.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.93%. Comparing base (0d9472d) to head (b603560).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3211   +/-   ##
=======================================
  Coverage   94.93%   94.93%           
=======================================
  Files         507      507           
  Lines       11185    11185           
  Branches     1722     1722           
=======================================
  Hits        10619    10619           
  Misses        566      566           

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