Align return type of controller methods

[olivernybroe]

Laravel recently aligned the return types of builders, so they all implement the same interface, making type hinting really easy and straightforward, plus it helps the IDE and phpstan quite a lot. #37956

This issue here is about also aligning the return types of controller method data. Normally people use

• response giving you a Illuminate\Http\Response instance
• redirect giving you a \Illuminate\Http\RedirectResponse instance
• view giving you a \Illuminate\Contracts\View\View instance
• response#json giving you a \Illuminate\Http\JsonResponse instance
• response#stream giving you a \Symfony\Component\HttpFoundation\StreamedResponse instance
• response#download giving you a \Symfony\Component\HttpFoundation\BinaryFileResponse instance

There are probably more which I missed.

What I am suggesting here is aligning them all to implement the same interface, like it was done with the builder.
By having a unified interface I wouldn't have to change the return type because I changed it to a redirect instead of a json response.

A possibility could be to use the currently existing Renderable interface, but might be some problems with that which I haven't thought of.