Proposal / Question: Support for NPM Workspaces

[Yharooer]

Hi there!

Thanks for creating GPM! Godot's lack of a dependency management system has been bugging me for a while and I'm glad to have stumbled upon this. I was wondering whether this project is still being actively maintained?

One of the things which I have been interested in is working on multiple projects in smaller packages locally and being able to use them together similar to NPM workspaces. I was wondering whether it is currently possible to do this without publishing your packages to NPM? If not, would there be scope for this to be added to GPM? I appreciate you may be busy so I was also wondering whether you would consider merging in this functionality if I was to raise a PR to try to add this?