[BUG] - git restore command does not work

The `git restore` command does not remove a file from the staging area!

An accepted solution will allow files to be remove from the git staging area. The demo should show: 
1. files being added, shown with `git status`
2. files removed and confirmed with `git status`

## 🔗 Docs:
https://libgit2.org/libgit2/#HEAD/group/index/git_index_remove 