`static` method support in builtin functions and classes.

[Almas-Ali]

Describe the solution you'd like What we have now.

json = Json()
json.loads(...)
json.dumps(...)

What it should be.

Json.loads(...)
Json.dumps(...)

For this we can create a new decorator @static and this will convert that method as static so it can be accessible by Radon as static method.