[3.x - epic] Laravel app refactoring

For 3.x we want to move towards the ability to integrate Flarum into Laravel projects.

This will require several rewrites of core components and, as such, cannot be part of 2.x. This epic is to collect, list and follow up on any requirements.

### Requirements

- Refactor the HTTP component, replace fast-route with illuminate http routing, see #3865
- Prevent conflicts between route names of Flarum versus Laravel
- Guarantee view namespace on core and extensions.
- Allow injecting views/components/livewire entities into the base template(s)