Added shoulder bag recovery

Add extra shoulder bags (use mod added shoulder bag slot)
Add original shoulder bag to mod extra shoulder bag making recipe.

A major update that uses the BodyLocationsTweaker API code to make the mod more compatible.
Split the original mod into two parts only Vanilla and brita plus
Fixed a bug where some stickers were missing from the backpack when equipping the hunting vest
Add some brita gear that was not previously added

I'm sorry, due to a personal mistake. After the update found the problem, I am trying to correct. I will temporarily roll back the mod to the original version.

修复了单腿/双腿腿包能互相转换的漏洞。
重新平衡了部分背包容量。
添加了单枪套到双枪套的升级配方。