feat(武器/特效): 新增扶桑元神武器及爆炸特效

添加扶桑元神武器相关资源及功能实现，包括：
- 新增武器图标、描述和属性配置
- 实现格挡子弹并生成乾坤剑的逻辑
- 添加符咒爆炸特效及相关动画资源
- 调整乾坤剑伤害值和生成位置
- 优化武器特效控制器支持纹理动画

scripts/Contents/Bullets/QKSword.gd

@@ -3,11 +3,15 @@ class_name QKSwordBullet
 
 var tracer: EntityBase
 var attackedTracer: bool = false
+var spawnSpeed: float = 1
 
+func register():
+	spawnSpeed = randf_range(0.25, 1.75)
+	animator.speed_scale = spawnSpeed
 func ai():
 	if is_instance_valid(tracer) && !attackedTracer:
 		look_at(tracer.getTrackingAnchor())
-	if timeLived() > 1000:
+	if timeLived() > 1000 / spawnSpeed:
 		PresetBulletAI.forward(self , rotation) # 前进
 		hitbox.disabled = false
 	else:
@@ -16,6 +20,6 @@ func succeedToHit(_dmg: float, entity: EntityBase):
 	if entity == tracer:
 		attackedTracer = true # 只需要命中一次目标就不需要继续前进了
 	EffectController.create(
-		ComponentManager.getEffect("CatBoom"),
+		ComponentManager.getEffect("FooExplosion"),
 		entity.texture.global_position
 	).shot()