Support multiple packages in the same repo

[CasperWA]

Closes #55

Updates package_dir inputs to package_dirs: A single or multi-line input for listing multiple paths to packages, if so desired.

This updates the create-api-reference-docs pre-commit hook and associated workflows.

Also - it reverts to not use the experimental Python parser (griffe) for mkdocstrings.

[codecov-commenter]

Codecov Report

Merging #58 (657136a) into main (e9addb8) will increase coverage by 0.19%.
The diff coverage is 57.89%.

@@            Coverage Diff             @@
##             main      #58      +/-   ##
==========================================
+ Coverage   50.39%   50.58%   +0.19%     
==========================================
  Files           3        3              
  Lines         256      255       -1     
==========================================
  Hits          129      129              
+ Misses        127      126       -1     

Impacted Files	Coverage Δ
ci_cd/tasks.py	50.60% <57.89%> (+0.20%)	⬆️

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