Hover does not show default arguments

[Caleb-o]

Describe the bug
C3 has default function arguments, which seem mostly in cases of allocation based functions. Currently hover does not show what those arguments are.

To Reproduce

module myproject;

import std::io;

fn void using_default(int foo, bool bar = false) {
  io::printfn("foo %s, bar %s", foo, bar);
}

fn void main() {
  using_default(10);
  using_default(20, true);
}

Collections example:

import std::io;
import std::collections::map;

def IntMap = map::Map(<String, int>);

fn void main() {
  IntMap imap = map::new(<String, int>)();
  defer imap.free();

  imap.set("Hello", 100);
  io::printfn("hello = %s", imap.get("Hello")!!);
}

Expected behavior
Show default arguments

Screenshots

Desktop (please complete the following information):

• OS: Arch Linux
• Editor: VS Code
• Version: main - 2bb88ed

[pherrymason]

Notes: Current structure is not parsing default values assigned to arguments.
Indexable arguments should be able to accomodate those references. Maybe a simple string would suffice?