supporting auto generation of methods in Create New Symbol Action

[vzmerr]

Is your feature request related to a problem? Please describe.

It would be cool if Metals adds Method to the suggested list for creating a new symbol.

Describe the solution you'd like

It would be better if the option to generate a method like:

def buildNewSchool(arg1: String, arg2: Int): School = ???

is added to the list of symbol types.

Describe alternatives you've considered

not implementing this.

Additional contex

IntelliJ currently supports that; and it saves the programmer lots of time, particularly when the arguments list is big. It would be awesome if Metals adds support for it, too.

Search terms

Inferring Methods Create New Symbol Code Action

[tgodzik]

The work is started in scalameta/metals@e7c21ae

Main issue is that we don't sometimes get the types if the method is invalid, so we might need to replace the invalid method with something like identity.