Refactor the console subsystem

Rename cli.ino => console.ino.
Rename handleInput => handleConsole.
Separate console initialization function.
Always use usb cdc by default on s3/c3 (no configuration needed).

gazebo/flix.h

@@ -45,7 +45,7 @@ void testMotor(int, float);
 void print(const char* format, ...);
 void pause(float duration);
 void doCommand(String str, bool echo);
-void handleInput();
+void handleConsole();
 void setupRC();
 void normalizeRC();
 void calibrateRC();

gazebo/simulator.cpp

@@ -18,7 +18,7 @@
 #include "Arduino.h"
 #include "flix.h"
 
-#include "cli.ino"
+#include "console.ino"
 #include "control.ino"
 #include "estimate.ino"
 #include "safety.ino"
@@ -83,7 +83,7 @@ public:
 		attitude.setYaw(this->model->WorldPose().Yaw());
 
 		control();
-		handleInput();
+		handleConsole();
 		processMavlink();
 
 		applyMotorForces();