Epic #83968: PSR-11 Initiative
Decouple Bootstrap and Application initialization
In order to support full-application subrequests (later on),
bootstraping, application initialization and application execution
should be decoupled.
To be able to initialize a frontend Application in backend
Application context, the frontend Application should not re-execute
- Bootstrap should be limited to bootstrapping (oh wonder!)
=> setting up global services/whatever, not more.
- A Container (PSR-11) performs initialization
=> e.g. `new Frontend/Http/Application()`
- Application performs execution
=> checking possible (application specifc redirects)
=> offloading work to the request handler