Added health bar and snail behavior enhancements

- Introduced a health bar for flowers, which updates based on the current GameState values.
- Enhanced snail behavior with eating and sleeping states. Snails now have a chance to switch to the sleeping state while eating.
- Improved mouse interaction with snails, allowing them to potentially switch to sleep mode when clicked.
- Refactored cursor management into its own class for better code organization and readability.
- Updated drone placement logic to use the new CursorManager class.
- Added functionality for bees to replenish flower nectar levels after a certain number of deposits.

entities/Flowers.tscn

@@ -126,3 +126,13 @@ libraries = {
 autoplay = "Highlight"
 
 [node name="Snail" parent="." instance=ExtResource("5_5uu7l")]
+
+[node name="HealthBar" type="ProgressBar" parent="."]
+offset_left = -50.0
+offset_top = 90.0
+offset_right = 50.0
+offset_bottom = 110.0
+mouse_filter = 2
+max_value = 10.0
+step = 1.0
+show_percentage = false