Lora led rx (#10674)

* add optional LED_LORA to indicate LoRa TX

* Briefly flash LED_LORA on packet RX

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Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

variants/esp32s3/ELECROW-ThinkNode-M7/variant.cpp

@@ -5,4 +5,6 @@ void initVariant()
 {
     pinMode(LED_PAIRING, OUTPUT);
     digitalWrite(LED_PAIRING, !LED_STATE_ON); // Turn off the LED to start
+    pinMode(LED_LORA, OUTPUT);
+    digitalWrite(LED_LORA, !LED_STATE_ON); // Turn off the LED to start
 }