feat: Introduce an EnhancedGridMap with advanced generation, randomization, pathfinding, and data serialization, along with new player, powerup, and portal managers.

scripts/managers/player_movement_manager.gd

@@ -160,6 +160,12 @@ func try_push(target_pos: Vector2i, direction: Vector2i) -> bool:
 	if not other_player:
 		return false
 	
+	# === INVULNERABILITY CHECK ===
+	if other_player.get("is_carrying_tekton"):
+		print("[Move] Push blocked: Target is carrying a Tekton and is invulnerable.")
+		NotificationManager.send_message(player, "Target is Immune!", NotificationManager.MessageType.WARNING)
+		return false
+
 	# === NEW LOGIC: Only allow push if in ATTACK MODE ===
 	if not player.get("is_attack_mode"):
 		# Standard bumping effect or nothing?