‹Addon›Add freecad-git: selective Git versioning workbench

### 🔌 𝗥𝗲𝗽𝗼𝘀𝗶𝘁𝗼𝗿𝘆

https://github.com/FredericVicher/freecad-git

### 📑 𝗡𝗼𝘁𝗲𝘀

```txt
Named as Git in the list (with its icon)

- Commit selective document content (Document.xml + imported geometry) to Git
- Navigate project history and pull any previous version
- Automatic recomputation of derived features
- Compatible with FreeCAD 1.1+ (pygit2 included)
- No external dependencies
```