feat(武器): 调整HXD武器的属性和攻击逻辑

- 将子弹的生命周期从5000ms缩短至2500ms
- 提升攻击力加成系数从1.5调整为2
- 增加子弹数量加成从2调整为3
- 修改攻击循环使用count而非atk值

scripts/Contents/Weapons/HXD.gd

@@ -2,11 +2,11 @@
 extends Weapon
 
 func update(to: int, origin: Dictionary, _entity: EntityBase):
-    origin["atk"] += 1.5 * to * soulLevel
-    origin["count"] += 2 * (soulLevel - 1)
+    origin["atk"] += 2 * to * soulLevel
+    origin["count"] += 3 * (soulLevel - 1)
     return origin
 func attack(entity: EntityBase):
-    for i in readStore("atk"):
+    for i in readStore("count"):
         for bullet in BulletBase.generate(
             ComponentManager.getBullet("HXD"),
             entity,