How do I add dependencies (one repository depends on another) via GitHub web / desktop interface? Of course if there is, as there is no specific answer to the question, I also accept alternative methods via Git for example.
That is: I look for something of the type:
X repository depends on a Y repository, this Y sits in a Y folder in the default directory that contains X and is updated automatically.
I think this is how repository dependencies work.
OBS: Access them in Graphs-Dependencies in GitHub