Ported from master to next:

#1489: TRACE() output intercepted and shown in Companion (shortcut F6)
#1270: simple Trainer Simulator (shortcut F5)
#1466: telemetry simulator (shorcut F5)

companion/src/simulation/simulatorinterface.h

@@ -80,6 +80,11 @@ class SimulatorInterface {
 
     virtual const char * getError() = 0;
 
+    virtual void sendTelemetry(uint8_t * data, unsigned int len) = 0;
+
+    virtual void setTrainerInput(unsigned int inputNumber, int16_t value) = 0;
+
+    virtual void installTraceHook(void (*callback)(const char *)) = 0;
 };
 
 #endif