Hardcoded Munich city areas

[florian-krueger]

Is your feature request related to a problem? Please describe.
Right now some Munich city areas are hardcoded, see e.g. Stadtbezirk.java

Describe the solution you'd like
City areas cannot be hardcoded into a system, they need to be configurable for other cities to the use the software and adapt it to their individual needs.

Describe alternatives you've considered
No alternative.

Additional context
These hardcoded city areas are even referenced in test cases. What is that for?

[klml]

https://github.com/it-at-m/dave-backend/blob/dev/src/main/java/de/muenchen/dave/domain/enums/Stadtbezirk.java

[klml]

@martind260 we talked about this, a while ago, you mentioned it would be easy to make the array "Stadtbezirk" configurable.

The structure of the "Stadtbezirk" and "Stadtbezirksviertel" remains unaffected by this.

[klml]

@florian-krueger The structure "Stadtbezirksviertel" and "Stadtbezirksviertel" would be ok for you?