security/netbird: New Port: wireguard based VPN client

NetBird is an open-source WireGuard-based overlay network combined with
Zero Trust Network Access, providing secure and reliable connectivity
to internal resources.

Key features:
- Zero-config VPN: Easily create secure connections between devices without
  manual network setup.
- Built on WireGuard: Leverages WireGuard's high-performance encryption for
  fast and secure communication.
- Self-hosted or Cloud-managed: Users can deploy their own NetBird management
  server or use NetBird Cloud for centralized control.
- Access Control & Routing: Fine-grained access control policies and automatic
  network routing simplify connectivity.
- This FreeBSD port provides the NetBird client daemon and CLI tools,
  allowing FreeBSD systems to join a NetBird mesh network and securely
  communicate with other peers.

For more details, visit: https://netbird.io

PR:		284877