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