Add experimental rule to lint/format the spacing after the type parameter list in a function signature

[paul-dingemans]

Description

Add experimental rule to lint/format the spacing after the type parameter list in a function signature.

It fixes code like below:

            // Too many spaces
            fun <T>  foo(t: T) = "some-result"

            // Missing space
            fun <T>foo(t: T) = "some-result"
     
            // Unexpected newlinw
            class Bar<T>
            {
                val bar: T? = null
            }
            class Foo1<Bar>
                constructor() {}
            class Foo2<Bar>
                actual constructor() {}

            // Unexpected space between parameter list and constructor
            class Bar <T> (val t: T)

This rule is required to create a rule which can rewrite the function signature automatically as is described in #1341

Checklist

• tests are added
• CHANGELOG.md is updated