feat: dragons moving freely

@onready var draggable: Draggable = $DragDropDetector

var _walking: bool = false

var _thinking_path: bool = false

var _target_pos: Vector2

var rng: RandomNumberGenerator = RandomNumberGenerator.new()

signal place_back(dragon: Dragon)

	place_back.emit(self)

func _ready() -> void:

	_pick_random_screen_position()

func _process(delta: float) -> void:

	if draggable.dragging:

		_actual_position = position

		return

	if not _walking:

		if not _thinking_path:

			_thinking_path = true

			await get_tree().create_timer(rng.randf_range(2, 7)).timeout

			_pick_random_screen_position()

	_move_to_target(delta)

		var direction: Vector2 = (_target_pos - _actual_position).normalized()

		_actual_position += dragon_speed * direction * delta

		position = _actual_position

		return

	_walking = false

func _pick_random_screen_position() -> void:

	_walking = true

	_target_pos = Vector2i(10, 10)

	_thinking_path = false

	var display_index: int = DisplayServer.window_get_current_screen()

	var work_area_position: Vector2i = DisplayServer.screen_get_usable_rect(display_index).position

	var work_area_size: Vector2i     = DisplayServer.screen_get_usable_rect(display_index).size

	var random_pos: Vector2i = Vector2i(

		work_area_position.x + rng.randi_range(10, work_area_size.x - 10 - size.x),

		work_area_position.y + rng.randi_range(10, work_area_size.y - 10 - size.y)

	)

	_target_pos = random_pos