Update flower entity to spawn snails based on game state.

- Added Snail entity with states for eating and sleeping.
- Modified Flowers script to handle snail spawning logic.

utility/game_state.gd

@@ -13,6 +13,9 @@ var level_started : bool = false
 var level_complete : bool = false
 var game_over : bool = false
 
+## Game Rules 
+var spawn_snails : bool = false
+
 var gathered_nectar : int = 0 :
 	get:
 		return gathered_nectar