docs(python): Annotate Config kwarg options

[etrotta]

Adds a TypedDict listing all valid options you can pass directly to Config()

Closes #18987

[etrotta]

Regarding the mypy error,

Run mypy 
tests/unit/test_config.py:742: error: Unexpected keyword argument "i_do_not_exist" for "Config"  [call-arg]
polars/config.py:175: note: "Config" defined here
Found 1 error in 1 file (checked 535 source files)
Error: Process completed with exit code 1.

Is the usual approach just # type: ignore or there's something more appropriate for that? maybe something that asserts mypy should error?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.87%. Comparing base (901b243) to head (0d352df).
Report is 66 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #18988      +/-   ##
==========================================
- Coverage   79.88%   79.87%   -0.02%     
==========================================
  Files        1524     1524              
  Lines      207634   207833     +199     
  Branches     2904     2908       +4     
==========================================
+ Hits       165873   166005     +132     
- Misses      41214    41279      +65     
- Partials      547      549       +2     

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[alexander-beedie]

Is the usual approach just # type: ignore or there's something more appropriate for that? maybe something that asserts mypy should error?

It's in tests; just type-ignore it and I'll approve/merge ;)

[etrotta]

Is the usual approach just # type: ignore or there's something more appropriate for that? maybe something that asserts mypy should error?

It's in tests; just type-ignore it and I'll approve/merge ;)

Thanks!

I also asked elsewhere and got the same recommendation, apparently the standard way of doing "something that asserts mypy should error" is just using --warn-unused-ignores

[alexander-beedie]

Nice one; thanks for the PR 👍