feat: Add new animation scene and script to manage ready-go, safe-zone, and stop-phase visual effects.

scenes/animation.gd

@@ -0,0 +1,14 @@
+extends Control
+
+@onready var animated_sprite_2d: AnimatedSprite2D = $StopPhase/AnimatedSprite2D
+@onready var animation_player: AnimationPlayer = $AnimationPlayer
+
+func _input(event: InputEvent) -> void:
+	if event.is_action_pressed("grab_item"):
+		animation_player.play("stop-phase")
+
+func stop_phase_anim_play():
+	animated_sprite_2d.play("stop-phase")
+
+func stop_phase_anim_stop():
+	animated_sprite_2d.stop()