[RFC] Test feature on routing

[ajgarlag]

Describe the solution you'd like
I'd like to hide some routes behind a 404 error page when a feature is disabled.

Describe alternatives you've considered
I think we can add a feature attribute to routes and have a listener to check this feature on kernel.controller event

Additional context
See:

• https://github.com/bestit/flagception-bundle/blob/master/docs/route.md
• https://github.com/zenstruck/signed-url-bundle#auto-verify-routes
• https://symfony.com/blog/new-in-symfony-6-1-services-in-route-conditions

[kpicaza]

I like the idea. It would be a nice improvement. I have to dig more in-depth into Symfony's kernel events system, and it sounds like an opportunity to do it.

Thank you @ajgarlag for sharing.

[ajgarlag]

I've added a link to https://symfony.com/blog/new-in-symfony-6-1-services-in-route-conditions into issue description

[kpicaza]

I'll give it a try this weekend.