docs: Update docstrings to numpydoc style

[Azaya89]

fixes #6502

• converts all public API docstrings to use numpydoc format

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.76%. Comparing base (d12d3df) to head (eee560d).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6506   +/-   ##
=======================================
  Coverage   88.76%   88.76%           
=======================================
  Files         323      323           
  Lines       68734    68734           
=======================================
  Hits        61013    61013           
  Misses       7721     7721           

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[hoxbro]

I skimmed through the code. Looks like tab is wrongly used in some places.

I think this can be fixed with ruff rules: my suggestion would be something like these rules to start with: ruff check holoviews/ --select=D --ignore=D1,D205,D400,D401,D404

And setting the convention to numpy:

[tool.ruff.lint.pydocstyle]
convention = "numpy"

[Azaya89]

I have no idea why the unit tests on 313 are failing now :(

[hoxbro]

I have no idea why the unit tests on 313 are failing now :(

Not related to this PR. Will take a look at it now.