adding arguments with correct types in creating new symbol

[vzmerr]

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

Currently, invoking the code action for creating a new symbol does not add arguments to the generated symbol.

Describe the solution you'd like

I think it's better if the arguments be added with their inferred types to the symbol as in
case class School(arg1: String, arg2: Int)

Describe alternatives you've considered

not adding the arguments.

Additional contex

IntelliJ provides this feature, which is particularly useful with longer lists of arguments and complex code.

So it would be cool if Metals also supports that.

Search terms

Create New Symbol Code Action

[tgodzik]

Thanks for raising this! It's kind of related to scalameta/metals@e7c21ae

Would be good to cover both, since it will msot likely reuse the same code.