Format fsharp code

[nojaf]

See #3596

When it comes to git hooks, you could add this one. However, a git hook is typically something personal which you don't put in source control (as it lives in the .git folder).

I've added the commands the F# team is using to format their code by commenting /run fantomas on the PR.

[dbrattli]

Very nice. Agree about git hooks. We could add that as developer documentation so those who wants can add themselves to avoid too many "fix formatting" commits.

[MangelMaxime]

For the git hooks, we could use Husky.Net.

This is a tool which allows you to commit the hooks information and then you can use dotnet husky attach to automate the installation.

We can run dotnet husky attach at the top of the build process:

[<EntryPoint>]
let main argv =
    let argv = argv |> Array.map (fun x -> x.ToLower()) |> Array.toList

	// Run dotnet husky attach here

    match argv with
    | "fable-library" :: args ->

What do you think?

[nojaf]

Interesting idea, I never heard of Husky.
Would be nice to play around with.
If the experience is positive, we might even recommend it in the Fantomas docs.

[MangelMaxime]

Thank you @nojaf