Add perspective to PyClient

Instead of giving players the exact same perspective, the PyClient can now give personal information to each server. For example, they can now specify which player they are. Previously, a server had to guess whether it was placing X's or O's.

pyclient/__init__.py

@@ -60,7 +60,7 @@ class PyClient:
             agent = agents[player-1]
             payload = agent.poll(
                 game=current_state.action_name(),
-                payload=current_state.to_dict(),
+                payload=current_state.as_seen_by(player),
                 timeout=timeout,
             )
 

pyclient/games/tic_tac_toe.py

@@ -171,6 +171,17 @@ class TicTacToe:
     
     def action_name(self):
         return "/tic-tac-toe"
+    
+    def as_seen_by(self, player : int) -> Dict[str, Any]:
+        """
+            Return the view of the game from the perspective of a given player.
+
+            :param player: The perspective on the board.
+            :type player: int
+        """
+        out = self.to_dict()
+        out["your_token"] = str(Field.X) if player == 1 else str(Field.O)
+        return out
 
     def count_o(self) -> int:
         """