Dynamic analysis for Auth calls

[alies-dev]

Fixes #184

In this PR I added 3 handlers handlers that provide types for the following cases:

// Request
$request->user();
$request->user('guard-name');

// Auth
Auth::user();

// Guard
Auth::guard('guard-name')->user();

and some other less often used.

TODO:

• Add tests (can be tricky as I need to load custom auth.php config, any help is very welcome)
• Consider use template syntax for Guard to infer type like:

$guard = Auth::guard('guard-name');

return $guard->user();

---

Previous implementation attempts:

• Fixes #184 add UserHandler #217

[tm1000]