Add Support for Breaking Down Type Signatures in Tooltips about fsautocomplete HOT 4 OPEN

I agree this would be very nice to have but I think something like this should live in FSharp.Compiler.Service. If it's possible to prototype in FsAutocomplete, I'm for it but I get the feeling you'll hit some pain points and will have to push into FCS.

I also recall reading issues about this becoming extremely complicated as you can compound aliases:

type Fooer = string
type MyFoo = int -> int

type FooItAgain = MyFoo -> Task<Fooer>
type SlightlyDifferentFooIt = FooItAgain

I can't recall any direct issues about this from a quick search though.

from fsautocomplete.

Sounds good. I'll bring it up over there and see how plausible it is. I agree the compounding will be fun to say the least

from fsautocomplete.

Aren't tooltips in FSAC their own thing? I always thought you gents rolled your own thing for tooltips.

from fsautocomplete.

I think it's all the backing needed for it, like getting aliases of aliases and such. Like there's a bug about them: ionide/ionide-vscode-fsharp#1947

from fsautocomplete.