Added basic virtual interface implementation, needs testing. Added Wintun licenses.

ATTRIBUTIONS.md

@@ -14,4 +14,11 @@ This project uses the standalone version of the ASIO C++ library for asynchronou
 - **Website:** https://github.com/jarro2783/cxxopts/
 - **Copyright:** (c) 2014-2025 Christopher M. Kohlhoff
 - **License:** MIT License
-- **License Text:** See `third_party/cxxopts/LICENSE_1_0.txt`
+- **License Text:** See `third_party/cxxopts/LICENSE_1_0.txt`
+
+## Wintun C++ Library
+- **Name:** wintun
+- **Website:** https://www.wintun.net/
+- **Copyright:** (c) 2018-2025 WireGuard LLC
+- **License:** MIT License OR GPL-2.0 License
+- **License Text:** See `third_party/wintun/`