[FEAT] Allow connection search directly from within "Better Bahn".

[dreirund]

Currently, I have to take the detour via bahn.de to use betterbahn.

I suggest that I can directly place the searches on betterbahn. With advanced options like stopovers, stopover times, train categories per leg.

Regards!

[FunctionDJ]

This was discussed on the Discord before and we agree that we eventually want to have a built-in search.