Add github guides

[danielfttorres]

for helpful to manage projects on github.
See: github guides.

[Snugug]

I love the GitHub Guides, especially the GitHub Workflow, but I'm not sure how the rest of the guides fit in as, while I love using GitHub for projects, it's not a requirement. How do you think this should be incorporated? Maybe referencing flows in the feature branches section? Would you be interested in adding that in through a PR?