Add follow state

[khalifan-kfan]

Description

Enable a requesting user to receive an attribute on whether they follow a project

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Trello Ticket ID

https://trello.com/c/mFTNG8os

How Can This Be Tested?

Try to fetch a user or project on this branch, you should be able to see the attributes mentioned

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[LanternNassi]

LGTM