The compatible.openmqttgateway.com site is offline (TLS connection reset),
leaving 38 dead links across the docs and README. Repoint BLE device lists
to the canonical Theengs Decoder devices page already used by the navbar,
point boards/devices/parts references to the corresponding docs pages, and
drop the affiliate-site mentions and 'Where to Buy' links that have no live
equivalent. Also fix a malformed markdown link in docs/use/ble.md.
* Added board ESP32 DOIT DevKit V1 with SX1278 module Ai-Thinker Ra01
Gateway using RTL_433_ESP library, need SX1278
ESP32 DOIT DevKit V1 & external Ai Thinker Ra01 Loraboard SX1278 on VPSI and (DIO0=15, DIO1=4, DIO2=16 and RST=17)
Florian