feat(角色): 添加KukeMC的AI逻辑和轮廓着色器

实现KukeMC的AI行为，包括子弹检测和Boss伤害逻辑
添加新的轮廓着色器用于角色渲染
在测试场景中新增角色和着色器演示

scripts/Contents/Characters/KukeMC.gd

@@ -1,2 +1,15 @@
 extends EntityBase
-class_name KukeMC
+class_name KukeMC
+func ai():
+	for bullet in get_tree().get_nodes_in_group("bullet"):
+		if (
+			bullet is LGBTBullet and
+			bullet.position.distance_to(self.position) < 100
+		):
+			bullet.tryDestroy()
+	for entity in get_tree().get_nodes_in_group("bosses"):
+		if (
+			entity.name == "FurryR" and
+			entity.position.distance_to(self.position) < 100
+		):
+			entity.takeDamage(114514)