🧹 Standard Codebase Format

[jameskr97]

clang-format through CI

This PR will introduce a consistent format across the codebase.

PR Changes

• [ ] .clang-format has reached an agreed-upon format among etterna developers and contributors
• [x] format target has been added to CMake to allow for easy updates of code format
• [ ] Github Actions is updated to verify format is correct
• [ ] .editorconfig updated to match .clang-format config

[jameskr97]

The above force-push is a rebase on develop.