Backlog Item: Implement role-based access

[thinkiqbs]

Acceptance Criteria:

• The system should have a user configuration interface that allows administrators to assign roles to users
• The system should have predefined roles such as administrator, user, and client
• The system should allow administrators to customize roles and assign specific permissions to each role
• The system should enforce role-based access and only allow users to access features and functions that they have been granted permission for
• The system should log any attempts to access restricted features or functions by unauthorized users