Add Google integrations and documentation

docs/google-maps.md

@@ -0,0 +1,33 @@
+# google-maps integration
+
+Google Maps traffic/ETA helper CLI using Geocoding API and Routes API.
+
+## What this integration is for
+
+- Drive ETA between two places
+- Leave-by time estimation for a target arrival
+- Quick traffic-aware route summaries
+
+## Runtime
+
+- `node`
+- no package dependencies beyond built-in runtime APIs on current Node
+
+## Auth
+
+Preferred:
+- `GOOGLE_MAPS_API_KEY` environment variable
+
+Fallback key file:
+- `~/.openclaw/credentials/google-maps/apikey.txt`
+
+Required Google APIs for the key:
+- Geocoding API
+- Routes API
+
+## Commands
+
+```bash
+node integrations/google-maps/traffic.js eta --from "DFW Airport" --to "Love Field" --departAt now
+node integrations/google-maps/traffic.js leave-by --from "Home" --to "DFW Airport" --arriveBy 2026-03-17T08:30:00-05:00
+```