Add timestamp at game creation

rpi/models/game.py

@@ -4,14 +4,16 @@ class Game:
     _black_name : str
     _time_control : int
     _increments : int
+    _timestamp : int
     _moves : list[str]
     _base_fen : str
 
-    def __init__(self, white_name : str, black_name : str, time_control : int, increment : int):
+    def __init__(self, white_name : str, black_name : str, time_control : int, increment : int, timestamp : int):
         self._white_name = white_name
         self._black_name = black_name
         self._time_control = time_control
         self._increments = increment
+        self._timestamp = timestamp
         self._moves = []
 
     def add_move(self, fen : str):