feat(ui): add TTL support and expiration management

[luannmoreira]

Description

This PR introduces Time-To-Live (TTL) support and expiration management for tunnels. It includes updates to the API, frontend components, and tests to accommodate the new TTL feature. Users can now specify a tunnel's TTL when creating it and view its expiration details in the tunnel list.
Changes
API Updates

Added ttl field:
    CreateTunnelRequest and Tunnel interfaces now support ttl for tunnel creation.
    Backend API methods (listTunnels, createTunnel) updated to handle TTL and pagination (page, perPage).
New expiration fields:
    expires_in added to Tunnel to represent expiration details.

Frontend Updates

TunnelCreate.vue:
    Added a combobox for TTL selection with predefined timeouts (e.g., 1 minute, 1 hour, 1 week).
    Validates TTL input using yup.
TunnelList.vue:
    Displays expiration date (expires_in) in a new column.
    Highlights expired tunnels with a warning style.

Utilities

Used moment for expiration date formatting and expiration checks.

Tests

Updated TunnelCreate.spec.ts and TunnelList.spec.ts to verify TTL functionality.
Added snapshot updates for TunnelList.

How to Test

Create a tunnel with TTL:
    Navigate to the "Create Tunnel" modal and select a TTL value.
    Verify the tunnel is created with the specified TTL.

View tunnel expiration:
    Navigate to the "Tunnel List" page.
    Confirm expiration dates are displayed and expired tunnels are highlighted.

Run tests:
    Execute unit tests to ensure functionality (yarn test).

Checklist

• Added TTL functionality to API and frontend.
• Updated tests and snapshots.
• Verified backward compatibility with existing features.
• Added documentation or comments where necessary.