add readme to smarthome example

examples/smart_home/README.md

@@ -0,0 +1,15 @@
+# smart home mcp server
+
+```bash
+cd examples/smart_home
+mcp install src/smart_home/hub.py:hub_mcp -f .env
+```
+where `.env` contains the following:
+```
+HUE_BRIDGE_IP=<your hue bridge ip>
+HUE_BRIDGE_USERNAME=<your hue bridge username>
+```
+
+```bash
+open -a Claude
+```