feat(cpn): iFlight Commando8 support (#2244)

* feat(cpn): Initial iFlight Commando8 support

* fix: Commando8 doesn't have trainer port

* feat: Add Simulator for iFlight Commando8
Also some minor code re-order for BetaFPV LR3PRO

* chore: EEPROM_VARIANT not used

* chore: Remove EEPROM bits that don't seem needed

* fix: Build simulator plugin

* fix: Simulator PGUP/PGDN the right way around

* fix: Keep trainer mode in cpn for MPM, etc

radio/src/gui/gui_common.cpp

@@ -882,7 +882,7 @@ bool isTrainerModeAvailable(int mode)
   )
     return false;
 
-#if defined(PCBXLITE) && !defined(PCBXLITES)
+#if (defined(PCBXLITE) && !defined(PCBXLITES)) || defined(RADIO_COMMANDO8)
   if (mode == TRAINER_MODE_MASTER_TRAINER_JACK || mode == TRAINER_MODE_SLAVE)
     return false;
 #endif