Asset-pack/manager support

[NemesisMate]

It would be awesome if there could be an easy way of managing asset-packs. Eg: adding compressed packs to the editor an this one allowing to browse those assets. If an asset is desired for it usage in the current project: <right-click> -> add to current project, and it gets copied from the compressed pack to the project.

This could, obviously, be improved with not only compressed packs but with any kind of "repository" (ie: zip, folder, online....), having not just an asset-pack support but a asset-browser/asset-manager's.