Feature/add editorconfig file

[TheSlowGrowth]

This is a proposal to add an .editorconfig file that can automatically configure code editors to use the recommended settings for this repository.

• Add .editorconfig file
• Add editorconfig extension to the recommended VSCode extensions
• Add a check to the style workflow that enforces the formatting
• Format all relevant files to the editorconfig settings (mostly removing trailing spaces)

[TheSlowGrowth]

okay, that github action is clearly not maintained anymore. I'll search for a replacement we can use. In the worst case, we could also choose to not verify the formatting on CI.

[TheSlowGrowth]

Okay, I removed the github action for now. There doesn't seem to be a readily available action that works :-(

[stephenhensley]

Side note -- holy cow, there was so much trailing white space in the comments!! 😱

[stephenhensley]

Hi @TheSlowGrowth

Sorry for the huge delay in getting to this one.
Last time I looked this over, I don't think I realized it was ready to review/merge due to the comments about the github action.

Happy to review/merge this if it's ready (looks like the conflicts are all fairly trivial atm).