Implement sorting for mentee applications by submission time

[Madhawa97]

Is your feature request related to a problem? Please describe.
Currently application submissions are not sorted.

Describe the solution you'd like
Enable sorting of mentee applications by the date-time of application submission in the dashboard.

• Implement UI controls for sorting in the application dashboard
• Ensure sorting works in both ascending and descending order
• Add visual indicator for current sort order in the UI
• Sort the latest application first by default

Describe alternatives you've considered

Additional context
Related backend issue: sef-global/scholarx-backend#151

[Michila0]

can you helper for me?