exit VL53L1X_SensorInit() after timeout if no sensor / sensor doesn't work

[zwerfl]

if there is no sensor connected the initialisation gets stuck in the while-loop inside of VL53L1X_ERROR VL53L1X::VL53L1X_SensorInit();
proposal is to add a timeout, so that the init() function returns to the calling program with a defined error code after a second or so

[AndyEngland521]

Added feature in v1.2.3, thanks @zwerfl

[zwerfl]

@ AndyEngland521: thanks for considering, and more important: many thanks for developing and providing this great lib!!!