Add Support PIN UI functionality

What does this MR do and why?

Add Support PIN UI functionality

• Add Support PIN generation and retrieval in AccountsController
• Display Support PIN in user profile and admin user view
• Add route for generating new Support PIN
• Implement UI for users to generate and view their Support PIN

This feature allows users to generate a Support PIN for authentication with the support team, enhancing security for support-related actions.

Changelog: added

References

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Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

As User:

1. Once logged in, click your user avatar > Preferences > Account
2. Click Generate New PIN button.

As Administrator:

1. Access Admin Area > Users
2. Click on User with PIN generated