feat(角色): 为KukeMC添加重型紫水晶攻击技能

- 新增HeavyCrystal.gd脚本实现重型紫水晶子弹逻辑
- 在KukeMC角色中添加type=3的攻击类型
- 调整子弹场景配置，增加粒子特效和碰撞检测
- 移除旧的生成子角色和随机水晶攻击逻辑

scripts/Contents/Bullets/BossAttack/KukeMC/HeavyCrystal.gd

@@ -0,0 +1,17 @@
+extends BulletBase
+
+@onready var trail: GPUParticles2D = $"%trail"
+@onready var track: Node2D = $"%track"
+
+var readyTime: float = 1000
+
+func spawn():
+	trail.emitting = false
+func ai():
+	if timeLived() < readyTime:
+		rotation = launcher.position.angle_to_point(launcher.currentFocusedBoss.position)
+	else:
+		PresetBulletAI.forward(self, rotation)
+		speed += 1
+		trail.emitting = true
+		track.visible = false

scripts/Contents/Characters/KukeMC.gd

@@ -7,15 +7,8 @@ func register():
 	attackCooldownMap[0] = 2000
 	attackCooldownMap[1] = 5000
 	attackCooldownMap[2] = 6000
+	attackCooldownMap[3] = 2000
 	inventory[ItemStore.ItemType.APPLE] = INF
-func spawn():
-	for i in 3:
-		var child = EntityBase.generate(load("res://components/Characters/KukeChild.tscn"), position + MathTool.randv2_range(500))
-		child.currentFocusedBoss = currentFocusedBoss
-		child.masterMine = self
-	for i in randi_range(5, 25):
-		BulletBase.generate(preload("res://components/Bullets/PurpleCrystal.tscn"), self, findWeaponAnchor("normal"), deg_to_rad(randf_range(0, 360)))
-		await TickTool.millseconds(randi_range(0, 50))
 func ai():
 	PresetEntityAI.follow(self, currentFocusedBoss, 500)
 	for bullet in get_tree().get_nodes_in_group("bullets"):
@@ -24,8 +17,9 @@ func ai():
 			bullet.position.distance_to(self.position) < 200
 		):
 			bullet.tryDestroy()
-	for i in len(attackCooldownMap.keys()):
-		tryAttack(i)
+	# for i in len(attackCooldownMap.keys()):
+	# 	tryAttack(i)
+	tryAttack(3)
 func attack(type):
 	if type == 0:
 		for i in randi_range(8, 16):
@@ -45,3 +39,5 @@ func attack(type):
 				fields[FieldStore.Entity.OFFSET_SHOOT] = 0
 				BulletBase.generate(preload("res://components/Bullets/PurpleCrystal.tscn"), self, findWeaponAnchor("normal"), deg_to_rad(360.0 / count * i + 360.0 / count1 * j))
 			await TickTool.millseconds(100)
+	elif type == 3:
+		BulletBase.generate(preload("res://components/Bullets/BossAttack/KukeMC/HeavyCrystal.tscn"), self, findWeaponAnchor("normal"), position.angle_to_point(currentFocusedBoss.position))