Add BETAFPV ELRS Micro TX Module 2.4G with ESP32 CPU

https://betafpv.com/products/elrs-micro-tx-module

mesh.proto

@@ -371,6 +371,11 @@ enum HardwareModel {
    */
   HELTEC_WSL_V3 = 44;
   
+    /*
+   * New BETAFPV ELRS Micro TX Module 2.4G with ESP32 CPU
+   */
+ BETAFPV_2400_TX = 45;
+  
   /*
    * Reserved ID For developing private Ports. These will show up in live traffic sparsely, so we can use a high number. Keep it within 8 bits.
    */