Implement Keycloak for Admin Dashboard

[Keegnan]

Describe the task
Gate the page and any data that is sent to it using keycloak

Acceptance Criteria

• A role is made in the keycloak integration that gives certain users admin access
• Those users, upon login, are directed to the admin dashboard
• Other users (or those who aren't logged in) are redirected to the main page if they try to access the admin dashboard
• In the API, data is only returned for any /admin endpoint if the user is an authenticated admin
• IDIR users without the "Admin" role should see a message indicating in they do not need permission
• "Login" button changed to "Admin Login" to indicate that not all users can login

Additional context

[raarielgrace]

Moving to blocked because there's what I would consider a bug in the citz-imb-sso-react module. Messaging one of the developers about the issue.