feat: improved dragon walking behaviour

scenes/window/draggable.gd

@@ -9,6 +9,9 @@ var dragging_start_position: Vector2i = Vector2i()
 
 var _initial_drag_requested: bool = false
 
+signal on_drag()
+signal on_drop()
+
 
 func _ready() -> void:
 	set_process_input(true)
@@ -33,9 +36,11 @@ func _input(event) -> void:
 		
 	if event.pressed:
 		dragging = true
+		on_drag.emit()
 		dragging_start_position = Vector2i(get_global_mouse_position())
 	else:
 		dragging = false
+		on_drop.emit()
 		if _is_inside_main_window():
 			_destroy_dragon()