feat: add Docker deployment, update install script, and project configs

- Add Dockerfile and docker-compose.yml for containerized deployment
- Rewrite install.sh for Docker-based setup (multi-distro support)
- Add Go module files (go.mod, go.sum) for WGRplane backend
- Add wgrplane.service systemd unit for Go backend
- Add CI verification scripts in scripts/
- Update README.md with Docker deployment docs
- Update .gitignore for binaries and .sisyphus/

wgrplane.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=WGRPlane Go Gateway Service
+Wants=network-online.target
+After=network-online.target
+
+[Service]
+Type=simple
+Environment=WG_RPLANE_MODE=forward
+ExecStart=/usr/local/bin/wgrplane
+Restart=always
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target