chore: add `check_format.yml`

[vil02]

I have noticed that formatting of some of the files is a bit off (cf. 7c18e42c9643db0ef8a66d9dd85c2a84f2793400). This PR formats some of the files and adds a workflow checking the formatting it the future.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (6046d53) 97.60% compared to head (1e3b029) 97.60%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #217   +/-   ##
=======================================
  Coverage   97.60%   97.60%           
=======================================
  Files         142      142           
  Lines        1796     1796           
=======================================
  Hits         1753     1753           
  Misses         43       43           

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[vil02]

Resolving conflicts, when formatting changes, can be painful. @uncomfyhalomacro could you please merge this PR?

[uncomfyhalomacro]

Resolving conflicts, when formatting changes, can be painful. @uncomfyhalomacro could you please merge this PR?

i dont have merge rights in some circumstances in this repository tbh. @Panquesito7 has the power here to do so