(Windows) Update WireGuard for Windows to v1.0

[stenya]

The latest version (v1.0) of WireGuard for Windows has been released:
https://git.zx2c4.com/wireguard-windows

Task:

• Review changes between the currently used version and v1.0
• Assess compatibility with the IVPN Client
• Identify any breaking changes (driver, service, installer, API)
• Integrate the updated version into the IVPN Client
• Perform regression testing (tunnels, routing, kill-switch, DNS, firewall rules)