Namespace naming assertions

[rela589n]

Enhancement description

It would really make sense to have the ability to enforce not only the actual class naming like this:

        return PHPat::rule()
            ->classes(Selector::extends(ApiTestCase::class))
            ->shouldBeNamed('/ApiTest$/', true);

But to apply rules for namespace:

        return PHPat::rule()
            ->classes(Selector::extends(ApiTestCase::class))
            ->shouldBeNamed('/\\\\Tests\\\\Api\\\\.+ApiTest$/', true);

In this example, phpat would check if api tests are placed in Tests\Api directory and named with ApiTest suffix.