As a player, I want the small and big blinds to rotate by one after each round, so that fairness and equity are maintained throughout the game.

[joelhube]

Acceptance Criteria: -when the game is finished the users in the list are rotated by one

Task Backend:

• [x] sopra-fs24-group-03/sopra-fs24-group-03-server#189
• [x] #207

Frontend:

• [x] sopra-fs24-group-03/sopra-fs24-group-03-client#75
• [x] sopra-fs24-group-03/sopra-fs24-group-03-client#76