Add support for Organisations

[martinheidegger]

Recently all the tools I am using (Github, Gitlab, Docker, etc.) offer to organise access using groups. This feature is necessary for comfortable setting up strider in a team environment.

[knownasilya]

@martinheidegger what kind of features would you expect?

Things that come to mind:

• Creating groups and assigning users to those groups
• Assigning groups as collaborators/admins to projects

Would love feedback from anyone in @Strider-CD/owners.

[michaelmior]

@knownasilya That seems like a reasonable first implementation of organizational features to me. I'm sure there are many things to add from there, but it seems like the smallest useful unit of work.

[fizerkhan]

+1