GitHub Actions Tidy-up (#3114)

- Allow CodeQL workflow to be run from GitHub Actions WebUI at any time
- Set CodeQL to also check for best practises/code problems (as well as security)
- Capitalize Publish GH Action
- Change Windows Test workflow for consistent file extension (also means its formatted with Prettier) and remove leading empty linebreak
- Run Prettier (maybe we should add this to build script to ensure all code is formatted?)
- Change .gitattributes to have LF line-endings for more file types