Support other remote repos (Gitlab etc)

[clorl]

First, I must says I love the project and I hope it is still actively maintained, keep up the good work and I'd be happy to help.

Basically the title : allow for a way to use other remote repos.

More specifically, options could provide a way to give any type of url and specify options to tell gd-plug how to install them.
E.g., point to a bash script etc.

[imjp94]

Thanks!

gd-plug does support all the git url, for example:

    # Source other than github
    plug("https://gitlab.com/Xecestel/sound-manager") # Gitlab
    plug("file:///D/Godot/local-project/.git") # Local git repo

It is shown in More Example, maybe I should add it to Config/Sources