Update pyproject with self install

[BradyAJohnston]

Properly adds the databpy . as a dependency for dev for running tests and also quarto-cli for docs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.53%. Comparing base (5a11433) to head (d43bb44).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #65   +/-   ##
=======================================
  Coverage   90.53%   90.53%           
=======================================
  Files          13       13           
  Lines         782      782           
=======================================
  Hits          708      708           
  Misses         74       74           

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