Fix make::unnamed_param result a untyped_param

[A4-Tacks]

• Add make::untyped_param
• Add some basic make tests

Example

make::unnamed_param(make::ty("Vec<T>")),

Before this PR

PARAM@0..4
  IDENT_PAT@0..4
    NAME@0..4
      IDENT@0..4 "Vec"

After this PR

PARAM@0..6
  PATH_TYPE@0..6
    PATH@0..6
      PATH_SEGMENT@0..6
        NAME_REF@0..3
          IDENT@0..3 "Vec"
        GENERIC_ARG_LIST@3..6
          L_ANGLE@3..4 "<"
          TYPE_ARG@4..5
            PATH_TYPE@4..5
              PATH@4..5
                PATH_SEGMENT@4..5
                  NAME_REF@4..5
                    IDENT@4..5 "T"
          R_ANGLE@5..6 ">"

---

Assist: Generate a type alias for function with unnamed params

fn foo$0(x: Vec<i32>) {}

Before this PR

type FooFn = fn(Vec);

fn foo(x: Vec<i32>) {}

After this PR

type FooFn = fn(Vec<i32>);

fn foo(x: Vec<i32>) {}

[A4-Tacks]

r? @ShoyuVanilla

[ShoyuVanilla]

Assist: Generate a type alias for function with unnamed params

fn foo$0(x: Vec<i32>) {}

Could you add a test for this as well?

[A4-Tacks]

This was tested in make

unnamed_param(ty("Vec<T>")),

[ShoyuVanilla]

Yeah, but I think having it within the assist's test suite as well would be nice

[ShoyuVanilla]

Thanks!