[Feature] Admin Dashboard For Role management.

[devesh711]

We need to develop an Admin Dashboard that allows for comprehensive role management.

The key features of this dashboard should include:

1. Role Management:

   • Change user roles.
   • Assign and remove permissions for each role.
   • View a list of all roles with their associated permissions.

2. User Management:

   • Assign and remove roles for users.
   • View a list of all users and their assigned roles.

Acceptance Criteria:

• An Admin Dashboard is implemented with the above-mentioned features.
• The UI is user-friendly and consistent with the existing design.
• Proper validation and error handling are in place.
• Comprehensive testing is performed to ensure the functionality works as expected.