Initial commit: MQTT to Clawdbot bridge

- Subscribe to MQTT topics, forward to Clawdbot webhook
- Configurable via environment variables
- Supports wake (system event) and agent (isolated) modes
- Includes systemd service template
- Home Assistant examples in README

mqtt-clawdbot-bridge.service

@@ -0,0 +1,22 @@
+[Unit]
+Description=MQTT to Clawdbot Bridge
+After=network.target
+
+[Service]
+Type=simple
+WorkingDirectory=/opt/mqtt-clawdbot-bridge
+ExecStart=/usr/bin/node index.js
+Restart=always
+RestartSec=10
+
+# Load environment from file
+EnvironmentFile=/opt/mqtt-clawdbot-bridge/.env
+
+# Security hardening
+NoNewPrivileges=true
+ProtectSystem=strict
+ProtectHome=true
+PrivateTmp=true
+
+[Install]
+WantedBy=multi-user.target