Added WireGuard configuration page

[SamLX]

Summary

This PR introduces a WireGuard configuration page, allowing users to view, edit, and reload WireGuard settings via the web interface.

Changes

• Added ext-wireguard.cgi

  • Displays /etc/network/interfaces.d/wg0, /etc/rc.local, and /etc/wireguard.conf.
  • Provides "Edit" buttons for modifying these files.
  • Implements a "Reload WireGuard configuration" button using wg setconf wg0 /etc/wireguard.conf.

• Updated p/header.cgi

  • Added a menu entry for WireGuard.

Testing

• Open the WireGuard page and verify file content display.
• Use "Edit" buttons to confirm correct redirection.
• Click "Reload WireGuard configuration" and check for success messages.

[SamLX]

Set executable permission for ext-wireguard.cgi

[flyrouter]

Good day
Thank you for your offer, however, most likely this page will be reworked later with the aim of creating a full-fledged service with input fields for all parameters and not just editing files.

[SamLX]

Hello.
That would be really great!
This solution could save users some time, considering that now you have to use a terminal to configure WireGuard.
Configuring WireGuard
Not everyone is a fan of the terminal. :D