fix: pytest --ruff and --ruff-format don't work at the command line

[skellys]

fixes #7 and #9

TODO

• fix test case test_pytest_ruff_noformat where --ruff is specified but not --ruff-format

[codecov]

Codecov Report

Merging #8 (3e0cfef) into main (df22c01) will decrease coverage by 53.71%.
The diff coverage is 64.28%.

@@             Coverage Diff              @@
##              main       #8       +/-   ##
============================================
- Coverage   100.00%   46.29%   -53.71%     
============================================
  Files            1        3        +2     
  Lines           17      108       +91     
  Branches         3       16       +13     
============================================
+ Hits            17       50       +33     
- Misses           0       50       +50     
- Partials         0        8        +8     

Files	Coverage Δ
tests/test_plugin.py	100.00% <100.00%> (ø)
pytest_ruff.py	25.64% <37.50%> (ø)

... and 1 file with indirect coverage changes

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[iurisilvio]

Thanks for the PR! I did a commit with some fixes, but it helped me a lot!