Add a major identifier for m5stack hardware.

Can be used for development and definitions on all variants (Stack, Stick, Core, Core2, Epaper, Stamps)

mesh.proto

@@ -348,6 +348,11 @@ enum HardwareModel {
    */
   DR_DEV = 43;
   
+  /*
+   * M5 esp32 based MCU modules with enclosure, TFT and LORA Shields. All Variants (Basic, Core, Fire, Core2, Paper) https://m5stack.com/
+   */
+  M5STACK = 44;
+  
   /*
    * 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.
    */