feat: add player core, movement, and playerboard managers, special tile effects system, and lobby scene.

scripts/managers/player_movement_manager.gd

@@ -36,6 +36,10 @@ func rotate_towards_target(target_pos: Vector2i):
 func simple_move_to(grid_position: Vector2i) -> bool:
 	if not player.is_multiplayer_authority() or is_moving:
 		return false
+	
+	# Check if player is frozen
+	if player.get("is_frozen"):
+		return false
 
 	# Check if target is within 1-tile range
 	var distance: int
@@ -79,6 +83,10 @@ func move_to_clicked_position(grid_position: Vector2i) -> bool:
 	if not player.is_multiplayer_authority() or is_moving or player.action_points <= 0:
 		return false
 	
+	# Check if player is frozen
+	if player.get("is_frozen"):
+		return false
+	
 	# Validate grid position is within bounds
 	if not enhanced_gridmap.is_position_valid(grid_position):
 		return false