Implement "View As" functionality for Admins

[Madhawa97]

Is your feature request related to a problem? Please describe.
The current platform does not allow admins to view the system from the perspective of mentors or mentees, making it difficult to assess the user experience or troubleshoot issues effectively without having to manually switch roles or accounts.

Describe the solution you'd like
Add a feature for admins to switch between mentor and mentee views of the platform.

Acceptance Criteria:

• Create UI toggle for admins to switch between views
• Ensure all relevant pages adapt to the selected view
• Add visual indicator of current view mode
• Implement proper access controls to prevent unauthorized use
• Add ability to quickly switch back to admin view
• Test thoroughly to ensure no admin actions are possible in mentor/mentee views

Additional Notes:
Consider adding a timeout or automatic return to admin view for security purposes.

Describe alternatives you've considered

Additional context