[🚀] Add Ability to write custom checks before a request is handled

[finnWellers]

Describe the solution you'd like
As a developer I want to be able to write my own interceptors which are executed before a request is handled. Either way it might be a good idea to rework the structure of the request handling mechanism.

Describe why you would like to see this implemented
That would enable developers to run their own custom code before handling requests and enable fr example custom filtering, blocking or manipulation of incoming requests. This of course would require a control mechanism for an interceptor to only intercept the requests of a specific controller it is allowed to.