[11.x] Auto discover Events outside app namespace when folder name is in kebab-case

[xizprodev]

Should fix:
#52975

Reproduction repo url: https://github.com/xizprodev/laravel-with-events.

Update:
Laravel 11 events are not auto discovered outside app folder when folder name is in kebab-case.

Example structure:
app
bootstrap
...
modules
modules-core (like custom-namespace in repo example)

In this case The method DiscoverEvents::classFromFile return Custom-namespace\FolderName\Listeners\CustomListenerName instead of CustomNamespace\FolderName\Listeners\CustomListenerName

[crynobone]

@xizprodev Please update the title and description for this PR so @taylorotwell can understand this better without having to read both PR and issue.

[xizprodev]

@crynobone updated!
i hope new description is clear.
thank you!