Allow plugin manager read addons folder inside subfolders.

[jinsediaoying]

This is similar to unity's Editor and Resources folder behaviour.
By doing so, we can organize codes by module.

like this

instead of currently this

[AnidemDex]

By default, Editor only look for plugin.cfg for each folder in addons, but you can activate/deactivate plugins in subfolders using the EditorInterface. Does that help? 🤔

[jinsediaoying]

My problem is that I want to create some code packs that I can easily share between projects (maybe as a git submodule).
Each code pack will have its own editor plugin, so I prefer to put all of stuff into one single folder.

Ops, I just realized I can make res://addons/MySystem to be that only folder!

[jinsediaoying]

It works, but it also mean I have to put all my runtime codes inside addons folder too.
I'm not sure it is a good practice, since addons folder more feels like a editor only stuff.

[AnidemDex]

addons are usually editor + game tools stuff