Add commit info to `version.h`

[elpekenin]

Description

Small changes to the CLI to add the current commit's hash into version.h aswell as a marker(*) to know if the repository contained any un-commited changes when firmware was compiled. This way we can print stuff like: firmware built with commit: e725d6b199*. I made this to show the hash on a corner of my Quantum Painter screen(s) but thought it could be useful to other people thus sharing it.

Types of Changes

• [ ] Core
• [ ] Bugfix
• [X] New feature
• [ ] Enhancement/optimization
• [ ] Keyboard (addition or update)
• [ ] Keymap/layout/userspace (addition or update)
• [ ] Documentation

Issues Fixed or Closed by This PR

Checklist

• [X] My code follows the code style of this project: C, Python
• [X] I have read the PR Checklist document and have made the appropriate changes.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [X] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [X] I have tested the changes and verified that they work and don't break anything (as well as I can manage).