feat: provide distinct server code with placement code

[timoknapp]

Since placement codes do actually relate to the servers and not to locations (#5) I extended the current config such that you can also provide the server code from which the placement code has been issued. This can be done by providing the related server code in parentheses like the following:

locations = 69123 Heidelberg[XXXX-XXXX-XXXX](XXX)

The big advantage of this is, that you can now use your placement code in every location you want to use them for. So lets assume you have a code generated from server 001-iz.impfterminservice.de and location 69124 Heidelberg but you want to use this code for the location 69123 Heidelberg which actually works with server 002-iz.impfterminservice.de. In order to do that you simply need to provide the code (001) in parentheses behind the placement code: 69123 Heidelberg[XXXX-XXXX-XXXX](001). With this config the impf-bot will directly go to the correct server and enter the corresponding placement code accordingly.

Regards Timo

[TobseF]

Great addition, tank you 👍 Hope you enjoyed the time with Kotlin😉

To check a lot of locations, this makes the locations config even longer and hard to maintain. To make it more user friendly, it would be a good time to separate the a location list.

[timoknapp]

Hi @TobseF ,

sure! But I am actually quite familiar with Kotlin, since I am writing Spring microservices with Kotlin the whole day 😄
You are right, lets see if I can find some time to create a new PR with the refactor.

Cheers