[FEATURE REQUEST] Automatically add newline to all files in new PRs

### I have searched through the issues and didn't find my problem.

- [X] Confirm

### Problem

There's often a missing newline at the end of the files, which [can cause issues with old code editors.](https://stackoverflow.com/a/2287990/12206312)

### Possible Solution

Add the [newline-action](https://github.com/marketplace/actions/newline-action) to a new github workflow

### Additional information

This will up the quality of devicons, and boost productivity for both reviewers and code contributors.