wants : change for three distance modes

Hi,
this issue is feature request .

VL53L1X chip datasheet say distance_mode has three enums.
```short,middle and long.```
but this library set only two. ```short and long.```

https://github.com/adafruit/Adafruit_CircuitPython_VL53L1X/blob/434cb7e129f798554e3fa7ee6fed676edd95b09e/adafruit_vl53l1x.py#L265-L294

could your change for three mode?

see this datasheet and section 2.5.1 Distance mode.
https://www.st.com/resource/en/datasheet/vl53l1x.pdf

thanks.