Refactor/separation of concerns consolidation

[fibenacci]

Also not 100% ready state. have to adjust styling in navigation and merge the current master state into this branch.
I will send you a separate comment when it's ready to review

[BentBr]

I see issues.

• why aren't you are using .vue components anymore?
• The entire refactor is hard to follow. It's even not really possible (without a lot of time) to evaluate if all tests still exist and do properly run.
• I see removed features like the mobile banner (which is needed as a hint to the users)

[fibenacci]

@BentBr

• i wrote a centralized vue file registration 834dba6, that combines ts, css und html files to a single vue file. The main reason is just more structure for any component and avoid reading god object files.
• i know this kind of refactor is a big commit (doesn't really follow devops core priniple), but in this case i think this is really necessary to get much more clearly overview about all available components
• the mobile banner stil exists. it'S just a shared component now

[fibenacci]

For now we have to pause this PR, because of the outbox implementation. In my opinion the outbox implementations has more priority.