CI/CD: clang-format

[eric15342335]

Use Github actions and clang-format to check code formatting for every pull requests.
Question: Which code formatting style do you prefer?

Some tools: clang-format configurator
(Note: please squash merge this.)

[eric15342335]

You can download the .clang-format file, place it in the same directory as your code, and run
clang-format <your_code> > output.cpp to see the formatted code (if you have installed clang-format).

I think we can either do the auto formatting ourselves, or we put it into github actions and let the bot do it for pull requests.

• I prefer the latter actually, since formatting commits are quite annoying to deal with. (Contribute # of lines, stales pull request review, etc)

[eric15342335]

I have written a working .yml file for github actions. It will automatically formats all the .cpp/.h files in the repository and (commit it) submit a pull request. I will create a pull request after this get merged.

[MaxChungsh]

go

[MaxChungsh]

approve