Redirect back when an Inertia response is empty (customizable)

[claudiodekker]

This PR automatically converts empty Inertia controller/action responses to Inertia redirects back.

This prevents the need to manually specify the redirect()->back(); at the bottom of all of your actions, keeping your code a little bit simpler. Do note that this doesn't mean you have to stop redirecting back manually if you prefer to have a consistent return value, but it does provide the option to omit it for those who'd rather not do it everywhere.

This behavior is customizable by customizing the onEmptyResponse method that's now part of the Middleware.
You can, for example, render an error page of your own using Inertia::render(), or throw an exception.

[innocenzi]

This looks nice and would certainly improve the DX.

As discussed on Discord: I suggest adding a property check (or something else) to allow for disabling the feature, to account for edge cases or other instances where this could be not needed.

[claudiodekker]

Alright, after lots of discussion in Discord I'm going to tweak this one a little.

[claudiodekker]

Updated. Also updated the original description.

[innocenzi]

That's great, good changes 👍