[DOCS] Remove dead compatible.openmqttgateway.com links (#2205) (#2322)

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.

README.md

@@ -34,7 +34,7 @@ Support open-source development through sponsorship and gain exclusive access to
 ### Theengs Plug, Bluetooth gateway (BLE) gateway and Smart Plug
 
 [Theengs plug](https://shop.theengs.io/products/theengs-plug-smart-plug-ble-gateway-and-energy-consumption) brings the following features:
-* BLE to MQTT gateway, tens of [Bluetooth devices](https://compatible.openmqttgateway.com/index.php/devices/ble-devices/) supported thanks to Theengs Decoder library. The plug uses an ESP32 acting as a BLE to Wifi gateway to scan, decode and forward the data of the nearby sensors,
+* BLE to MQTT gateway, tens of [Bluetooth devices](https://decoder.theengs.io/devices/devices.html) supported thanks to Theengs Decoder library. The plug uses an ESP32 acting as a BLE to Wifi gateway to scan, decode and forward the data of the nearby sensors,
 * Smart plug that can be controlled remotely,
 * Energy consumption monitoring,
 * Device tracker,
@@ -47,14 +47,14 @@ Support the project by purchasing the [Theengs bridge](https://shop.theengs.io/p
 
 ## Compatible items
 
-* [List of supported devices](https://compatible.openmqttgateway.com/index.php/devices/), door/window sensors, PIR sensors, smoke detectors, weather stations...
+* [List of supported devices](https://docs.openmqttgateway.com/prerequisites/devices.html), door/window sensors, PIR sensors, smoke detectors, weather stations...
 
-* [List of compatible boards (Off the shelf or DIY) is available](https://compatible.openmqttgateway.com/index.php/boards/), RF Bridge, IR, BLE gateways...
+* [List of compatible boards (Off the shelf or DIY) is available](https://docs.openmqttgateway.com/prerequisites/board.html), RF Bridge, IR, BLE gateways...
 
 *Running on a computer*
 If you want to use the BLE decoding capabilities of OpenMQTTGateway with a Raspberry Pi, Windows or Unix PC you can now leverage [Theengs Gateway](https://theengs.github.io/gateway/).
 
-* [List of compatible components to build your gateway](https://compatible.openmqttgateway.com/index.php/parts/), DHT, RF, IR emitters and receivers...
+* [List of compatible components to build your gateway](https://docs.openmqttgateway.com/prerequisites/parts.html), DHT, RF, IR emitters and receivers...
 
 ## Compatible controllers, saas or software
 
@@ -79,7 +79,7 @@ For Questions or Support please don't open an issue, first go to the [docs](http
 If you like the project and/or used it please consider supporting it! It can be done in different ways:
 * Helping other users in the [community](https://community.openmqttgateway.com)
 * [Contribute](development) to the [code](https://github.com/1technophile/OpenMQTTGateway) or the [documentation](https://docs.openmqttgateway.com)
-* Buy devices, boards or parts from the [compatible web site](https://compatible.openmqttgateway.com), the devices and parts linked use affiliated links.
+* Buy a [Theengs plug](https://shop.theengs.io/products/theengs-plug-smart-plug-ble-gateway-and-energy-consumption) or a [Theengs bridge](https://shop.theengs.io/products/theengs-bridge-esp32-ble-mqtt-gateway-with-ethernet-and-external-antenna)
 * Donate or sponsor the project [developers](https://github.com/1technophile/OpenMQTTGateway/graphs/contributors)
 * Make a video or a blog article about what you have done with [OpenMQTTGateway](https://docs.openmqttgateway.com) and share it to the [community](https://community.openmqttgateway.com)