FreeCAD Addon Manager

This module was originally developed within FreeCAD, and has now been extracted into its own git repository. It is re-integrated into FreeCAD's source tree as a git submodule.

Roadmap

This module is under active development, with the following rough plan

1. Complete migration to using the FreeCAD wrapper class to allow running outside of FreeCAD.
   1. Split addonmanager_utilities.py along GUI/No-GUI lines
   2. Refactor tests into pure GUI/No-GUI lines
   3. Verify that all FreeCAD.* and FreeCADGui.* calls are wrapped
2. Update GitHub CI to run Addon Manager test suite.
3. Migrate to a JSON-formatted addon repository list.
4. Rearrange codebase to better separate GUI from logic code.
5. Begin GUI redesign.

PRs are welcome!