Feature request: use as Git diff tool

I'd love to replace [Kaleidoscope](https://kaleidoscope.app/) with this app if it was developed further.

One of the most useful things for me is it being used as a Git diff tool i.e. if I want to compare my current branch against `main` I can run the following due to `[difftool "Kaleidoscope"]` in my Git config:

```sh
git difftool main
```

Could this app be used as the Git diff tool?