integrating eddystone into bluetooth package

docs/reference/bluetooth/stop-advertising.md

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+# Stop Advertising
+
+Stops advertising URL via the Eddystone protocol over Bluetooth.
+
+## ~hint
+
+### Eddystone
+
+Bluetooth beacons are used to indicate proximity to a place or object of interest. 
+Beacons use Bluetooth advertising to broadcast a small amount of data, 
+which can be received and acted upon by anyone in range with a suitable device and software, typically a smartphone and application.
+
+There are various beacon message formats, which define the way Bluetooth advertising packets are used as containers for beacon data. 
+iBeacon is Apple's beacon message format. Eddystone comes from Google.
+
+Read more at https://lancaster-university.github.io/microbit-docs/ble/eddystone/ .
+
+## ~
+
+```sig
+bluetooth.stop-advertising();
+```
+
+## See Also
+
+[advertise-url](/reference/bluetooth/advertise-url)