IV Vehicle Align

Fixed the issue where using Vehicle Align was possible while piloting the helicopter.
修复了驾驶直升机时可以使用对齐正方向功能的问题。

Helicopter hovering:
直升机悬停：
Added auxiliary hovering control for the helicopter. Press the Z key to switch to the hovering mode.
The deceleration in the helicopter hover mode can be modified in the ivvehiclealign-common.toml.
为直升机添加了辅助悬停控制，按下Z键开关悬停模式。
可绑定其他按键，启用时的减速度可在模组配置文件ivvehiclealign-common.toml中修改。