Auth: Rewrite frontend middleware and role guards

[Navmi-Srithaj]

Description

• Need to rewrite frontend middleware within the middleware/ directory.
• Create a broad auth redirect for any non-authenticated user in a file named auth.global.ts.
• For role-specific page guards, make a separate middleware based on role (for example, an admin.ts role middleware that can be registered for pages that only admins have access to).