Use scala-cli if scalafmt not present

[cwe-dixa]

scala-cli can download the correct scala native binary of scalafmt on demand, which has an even faster startup time. Just think of all the seconds we'll save!

[nicolas-dixa]

Noice 👍

[razvanz]

I would consider making 2 separate hooks: one for scalafmt and another for scala-cli.

[razvanz]

I guess that instead of listing with scalafmt, you could also list all the staged files with git diff --cached --name-only. After all, git add does not complain if you add a file that's already staged.

That should make it even faster :)

[razvanz]

Only QoL stuff.