[CI/CD] Add clang-format workflow

[ByteOtter]

What?

Add a clang-format workflow to the repo to check for code style using the existing .clang-format file.

This PR uses this existing workflow to improve and enforce code quality.

Links

Fixes: #2
Tracks: N/A

[ByteOtter]

@marv7000 looks like your .clang-format file was not correct, so I adjusted it according to my language server suggestions. The checks still fail though, because $REASON.

[marv7000]

Yea, I kind of just glossed over the docs for it. It fails because of "VariableCase" not being a key

[marv7000]

You might have to just nuke the case and comment style blocks at the end, since they don't seem to exist

[ByteOtter]

Yeah let's just keep it running over the entire codebase. You gotta fix the warnings anyway or add

int formatted_code;
// clang-format off
    void    unformatted_code  ;
// clang-format on
void formatted_code_again;

According to https://clang.llvm.org/docs/ClangFormatStyleOptions.html