Add audio effect and implement FireScan bullet behavior

- Added Rip.wav audio effect to the project.
- Created FireScan bullet script with speed and damage properties.
- Implemented basic AI movement for FireScan bullets.
- Introduced Wave class for managing enemy waves with dynamic counts and spawning logic.

scripts/Tools/WorldTool.gd

@@ -1,5 +1,5 @@
 extends Node2D
-class_name WorldTool
+class_name WorldManager
 
 static var rootNode: Node2D
 static var tree: SceneTree
@@ -7,3 +7,4 @@ static var tree: SceneTree
 func _ready():
 	tree = get_tree()
 	rootNode = self
+	Wave.next()