[Documentation] Repository Workflows and Our Setups

[kevin931]

I think the way we are managing this repo (in fact any PyCyto repos) are not obvious to newcomers. We should have a more thorough documentation on this, and provide a step-by-step guide on how people can meaningfully contribute to our project. Our current page offers some good guidelines, but it doesn't reflect the structure of the project. I will work on this once I have time.