Improve and correct German translation
After compiling and playtesting testing myself and with friends some issues cropped up.
This pr aims to correct them.
- Mainly added missing punctuation. Apparently that is easy to miss while writing in the text editor, but very apparent when reading in-app
- Corrected a few instances
- More consistency
I will likely maintain German translations in the future in case you add more strings. Quinb is very fun on long trips, and one of the few good one-device multiplayer games on F-Droid.