Enhanced snail animations and interactions

Added new animation states for the snail entity, including 'Move' and 'Sleep'. The snail now hides certain elements when eating and plays appropriate animations when transitioning between states. Also introduced a new texture for sleep indication.

entities/scripts/snail.gd

@@ -4,6 +4,7 @@ class_name Snail
 @onready var fsm : FiniteStateMachine = $StateMachine as FiniteStateMachine
 @onready var flowers : Flowers = get_parent()
 @onready var sprite : Sprite2D = $Sprite
+@onready var animation : AnimationPlayer = $AnimationPlayer
 
 var enabled : bool = false
 var eating : bool = false
@@ -13,6 +14,7 @@ var mouse_over : bool = false
 func _ready() -> void:
 	connect("mouse_entered", Callable(self, "on_mouse_entered"))
 	connect("mouse_exited", Callable(self, "on_mouse_exited"))
+	animation.connect("animation_finished", Callable(self, "on_animation_finished"))
 
 # Detect mouse left click and trigger function 
 func _input(event : InputEvent) -> void:
@@ -27,6 +29,12 @@ func eat() -> void:
 	# Reduce the GameState flower_nectar_level
 	GameState.flower_nectar_level -= 1
 
+func hide_zeds() -> void:
+	$Z.hide()
+	$Z2.hide()
+	$Z3.hide()
+	$Sprite/ShadowShell.hide()
+
 func maybe_sleep() -> void:
 	# If the snail is still eating, then we want a 30% chance of switching it it to the sleeping state
 	if eating:
@@ -46,4 +54,8 @@ func on_mouse_entered() -> void:
 func on_mouse_exited() -> void:
 	# Reset the cursor to the default
 	mouse_over = false
-	CursorMgr.reset_cursor()
+	CursorMgr.reset_cursor()
+
+func on_animation_finished(anim_name : StringName) -> void:
+	if anim_name == "GoingToSleep":
+		animation.play("Sleep")