* Feat: Implement page not found UI
* fix: check user login status and minor code refactoring
- Check if user is logged in or not in page header.
- Based on login status show relevant CTAs
- Fix ESLint errors
- Move RoleNameCell and DeleteActionCell as seperate components.
* fix: Add catch all for pagenotfound
* fix: Use constants and update css syntax.
Co-authored-by: Arpit Mohan <me@arpitmohan.com>
