Add QR and correct sequence
Update xDrip-Android.md
Add wiki based on M5_NightscoutMon (Bluetooth-only) Ported UI docs from Martin Lukasek's M5_NightscoutMon wiki, removed all Wi-Fi content, added Android M5Stack Loader install, device setup, and xDrip (Android) / xDrip4iOS setup with screenshots. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>