Reduced and improved logging

- removed unnecessary logging
- print start date and time when application starts
- use std::cout instead of qDebug()
- better logging in DroneController classes
- renamed Controller states for better readability

src/az_drone_controller_plane.h

@@ -11,5 +11,5 @@ public:
 
 protected:
     void droneStateMachineSlot(void) override;
-    bool stateWaitingMissionMode(void);
+    bool stateWaitAutoSwitch(void);
 };