Format Haskell with ormolu and elm with elm-format

[cgeorgii]

• Use ormolu
• Use elm-format
• Add info about formatting to README
• Add convenience scripts to format entire codebase

[aspiwack]

Use Ormolu, not Fourmolu. Rationale: this is what we use, and it's not a conversation that I want projects to spend time on.

[cgeorgii]

@marcosh No, unfortunately they are both opinionated and won't allow for configuration. I personally don't see the value of adding the package name to the import list, as it adds more noise than useful information.

[marcosh]

@marcosh No, unfortunately they are both opinionated and won't allow for configuration. I personally don't see the value of adding the package name to the import list, as it adds more noise than useful information.

The value is that, when you have a bunch of imports, you can easily see from which package the values are coming from