Send state of all players

actions/actions.proto

@@ -16,6 +16,12 @@ message Action {
 }
 
 message ServerMessage {
-    int32 player_id = 1;
-    // Add other fields for server responses
+    int32 player_id = 1; // Only used when initially assigning player ID
+    repeated PlayerState players = 2; // Player state updates
+}
+
+message PlayerState {
+    int32 player_id = 1;
+    int32 x = 2;
+    int32 y = 3;
 }