refactor(matchmaking): migrate Python simulator to native Nakama matchmaker

### Summary
Replaced legacy RPC-based matchmaking flow with proper WebSocket-driven
matchmaker integration. Player simulation now queues via
`matchmaker_add`, auto-joins matches on `matchmaker_matched`, and no
longer depends on `rpc_find_match`.

match_making_flow.py

@@ -2,10 +2,10 @@ import asyncio
 from game_flow import PlayerWebSocketHandler
 
 
-async def simulate_matchmaking(num_players: int = 6):
+async def simulate_matchmaking(num_players: int = 6, mode: str = "classic"):
     print(f"\n🎮 Spawning {num_players} players...\n")
 
-    # 1) Login + WebSocket connect (NO listener yet!)
+    # 1) Login + WebSocket connect
     players = await asyncio.gather(*[
         PlayerWebSocketHandler.setup_player(f"player_{i}")
         for i in range(num_players)
@@ -13,33 +13,33 @@ async def simulate_matchmaking(num_players: int = 6):
 
     print("\n✅ All players authenticated + connected\n")
 
-    # 2) First player requests match via RPC
-    p1 = players[0]
-    match_id = p1.rpc_find_match()
-    print(f"\n🎯 Match allocated: {match_id}\n")
-
-    # 3) Everyone joins the same match
-    await asyncio.gather(*[
-        p.join_match(match_id) for p in players
-    ])
-
-    print("\n✅ All players joined match\n")
-
-    # 4) NOW start websocket listeners (prevents recv race)
+    # 2) Start listeners BEFORE matchmaking
     for p in players:
         p.start_listener()
 
-    print("\n👂 Listening for match state + updates...\n")
+    print("\n👂 WebSocket listeners active\n")
 
-    # 5) Keep test running long enough to observe messages
-    await asyncio.sleep(10)
+    await asyncio.sleep(0.3)
+
+    # 3) Queue all players in matchmaking
+    print(f"\n🎯 Queuing players for mode={mode}...\n")
 
-    # 6) Cleanup
     await asyncio.gather(*[
-        p.close() for p in players
+        p.join_matchmaking(mode)
+        for p in players
     ])
 
-    print("\n🏁 Simulation complete\n")
+    print("\n✅ All players queued — waiting for matches...\n")
+
+    # 4) Allow enough time for Nakama matchmaker to group players
+    await asyncio.sleep(12)
+
+    # 5) Cleanup
+    print("\n🧹 Closing player connections...\n")
+    await asyncio.gather(*[p.close() for p in players])
+
+    print("\n🏁 Matchmaking simulation complete\n")
+
 
 
 if __name__ == "__main__":