feat(子弹系统): 将子弹添加到子弹组并调整KukeMC的检测逻辑

- 在BulletBase.gd中为生成的子弹实例添加"bullets"组
- 修改KukeMC.gd的ai逻辑，改为检测"bullets"组而非"bullet"组
- 调整KukeMC的子弹检测距离从100增加到200
- 移除KukeMC对bosses组的检测逻辑
- 在Wave.gd中将默认数据改为testBoss波次并添加KukeMC
- 为KukeMC场景添加脚本并设置初始生命值

components/Characters/KukeMC.tscn

@@ -1,7 +1,8 @@
-[gd_scene load_steps=4 format=3 uid="uid://d4lfjwy0hkidu"]
+[gd_scene load_steps=5 format=3 uid="uid://d4lfjwy0hkidu"]
 
 [ext_resource type="PackedScene" uid="uid://cvogxi7mktumf" path="res://components/Abstracts/EntityBase.tscn" id="1_r4q7y"]
 [ext_resource type="Texture2D" uid="uid://c1jhrutky8pya" path="res://resources/characters/kukemc/avatar.webp" id="2_422pv"]
+[ext_resource type="Script" path="res://scripts/Contents/Characters/KukeMC.gd" id="2_s2dg5"]
 
 [sub_resource type="SpriteFrames" id="SpriteFrames_1c0ui"]
 animations = [{
@@ -23,6 +24,7 @@ animations = [{
 }]
 
 [node name="KukeMC" instance=ExtResource("1_r4q7y")]
+script = ExtResource("2_s2dg5")
 displayName = "酷可mc"
 
 [node name="texture" parent="." index="2"]