Add a ‘leave project’ workflow in DEEP

[subinasr]

Background

Users can request to join a project but there's no defined workflow for a user to leave a project in DEEP. Allowing users to leave a project helps users better organize active ongoing projects.

Acceptance Criteria

• All members of a project should see a 'Leave project' button in a project item in 'Home' page.
• If an admin attempts to leave a project, it should not be allowed. Instead, the user should be prompted with a message to handover the admin rights of a project to someone else and then try leaving the project