feat(router): allow checking an action against the current route

[innocenzi]

This pull request adds the ability to check whether the current route matches the specified controller action:

// /user/1

Tempest\is_uri(UserController::class); // true
Tempest\is_uri(UserController::class, id: 1); // true
Tempest\is_uri(UserController::class, id: 2); // false

$router->isCurrentUri(UserController::class); // true
$router->isCurrentUri(UserController::class, id: 1); // true
$router->isCurrentUri(UserController::class, id: 2); // false

Note that this doesn't currently apply the regular expression constraint for a given parameter, allowing to match an invalid parameter against the current route (which should never happen, since the route would not have matched in the first place)