Add a guide to get started with development to the gitlab repo
I read the article on the need for extra developers for pygobject. One of the first things that I noticed once I went to the gitlab is that the readme is very limited. It might help if we add some basic info (dependencies, build steps) to make joining development easier.
Similar to the (now probably outdated) development guide. I also believe that it would be better to keep this starter info in this repo (e.g. the readme or a second file) to keep the info more centralized.
I would like to help with this, though I'm new to pygobject from an internal development perspective (I have used it for a few Gtk projects though).