[Minor] Independent SHP Vehicle Turret Files

[Fly-Star-him]

SHP turret vehicles support the use of *tur.shp files.
SHP炮塔车辆支持使用*tur.shp文件。

[github-actions]

Nightly build for this pull request:

• compiled-dll-2c66d9a0aa9df89aeda0748ae8f347cac5016431.zip
  These artifacts will expire in 90 days and will not be available for download after that time.

This comment is automatic and is meant to allow guests to get latest nightly builds for this pull request without registering. It is updated on every successful build.

[DeathFishAtEase]

I believe that even without any additional flags, it should be documented in detail as an Improvement. For instance, for Shape vehicles that use *tur.shp, what sequence should be used for the shp files that act as the body, what are the advantages of the new approach, how to transition from the old usage to the new usage, and other such details, similar to how it's done for Stationary vehicles.

我想它即便没有任何新增语句也应当作为一个功能改进在文档中详细说明，例如对与使用了 *tur.shp 的 Shape 载具其作为车体的 shp 文件应当使用什么样的序列、新的方式有哪些优势、旧的使用方式如何转为新的使用方式等内容，就像 静止的载具 那样。

[Rinimabi]

look like work (DRONTUR.shp)

[DRON]
Primary=120mmx
Turret=yes

[DeathFishAtEase]

look like work (DRONTUR.shp)

The effect of this asset display is not very obvious. If you want to test it, it might be more convenient to use TS's mmch.shp to split it into Shape files for the body and turret parts, and you can also check the differences between the two file organization methods.

[phoboscn-bot]

To Chinese users:
This pull request has been mentioned on Phobos CN. There might be relevant details there:

致中文用户：
此拉取请求已在 Phobos CN 上被提及。那里可能有相关详细信息：

https://www.phoboscn.top/t/topic/89/1