Add formatting

[gaetschwartz]

It would be amazing if the extension could also be a formatter for nu files. Is it something planned ? If it is already the case I couldn't find any documentation for it ?

[fdncred]

Agreed. Which is why we are working on https://github.com/fdncred/nufmt. If it matures enough we'll move it to the nushell org and use it from there perhaps.

[trymeouteh]

Would love to see Nushell come with a formatter with a formatting standard. Just like how Golang and Dartlang have a standard formatting style.