[10.x] Update Kernel::load() to use same classFromFile logic as events

[calebdw]

Closes #47312

Replaces the logic the Console\Kernel uses to parse classes from files with the same logic used by Events in DiscoverEvents::classFromFile()---this allows commands outside the App namespace to be auto-registered if desired.

Thanks!

[driesvints]

I don't feel we should do this. I don't think we should encourage people to move these files outside the default app directory.

[calebdw]

Why not? I work on a large application and we follow a DDD approach inside another namespace, there's no reason for an artificial restriction that all commands must be inside the app directory.

I just updated the logic to be consistent with the logic already being used when auto-registering Listeners

[calebdw]

Note that this was just a quick, in-place edit, but longer term it might be a good idea to move this logic to a DiscoverCommands class similar to DiscoverEvents (possibly with the common logic abstracted to a DiscoverClasses class that both of them extend)

[calebdw]

Thanks @taylorotwell!

[taylorotwell]

Reverted: #47377

[devlob]

I agree, I'm also using Laravel as my Infrastructure on a project that I use DDD and I was shocked that the commands for autoloading would be hardcoded to app, I want the freedom to change that as a developer.