fix: 统一子弹伤害属性设置并添加类型检查

修改多个武器和召唤物的攻击逻辑，将直接设置damage属性改为设置baseDamage属性
添加BulletBase类型检查确保安全访问子弹属性
移除Weapon.gd中冗余的鼠标事件连接

scripts/Contents/Weapons/ChainGun.gd

@@ -8,6 +8,7 @@ func update(to, origin, _entity):
 	return origin
 func attack(entity: EntityBase):
 	for i in BulletBase.generate(ComponentManager.getBullet("ChainGun"), entity, entity.texture.global_position, (get_global_mouse_position() - entity.texture.global_position).angle()):
-		i.damage = readStore("atk")
-		i.count = floor(readStore("count"))
-		i.splits = readStore("split")
+		if i is BulletBase:
+			i.baseDamage = readStore("atk")
+			i.count = floor(readStore("count"))
+			i.splits = readStore("split")