User/Member Management

[v15hv4]

• Implement form to search for user by email and add as member; if doesn't exist, create new user.
• Add edit & remove button to member cards; allow editing of role & removal of member from club.
• Convert year listing to collapsible list items like events
• Implement CC side dashboard to view pending membership approvals and approve them
• Create a user view modal that pops up when clicking an entry, shows all user details including list of clubs, roles, years