Doc update

[ysard]

Hello here is a small update of the documentation, especially about the color and distance sensor.
The description of the modes was not up to date.

Accepted values for set_color and returned values for COLOR_INDEX modes are not quiet documented but it's unclear for me.

First, I don't have this sensor and I don't know if COLOR_INDEX is the detected color by the sensor, or the current color of
the RGB led.

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About set_color: it appears it accept only BLACK/NONE, RED, GREEN and BLUE according to pybricks:

https://github.com/pybricks/pybricks-micropython/blob/master/pybricks/pupdevices/pb_type_pupdevices_colordistancesensor.c

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About the detection ability: the official documentation shows "6 colors".
https://brickset.com/sets/88007-1/

Idem in:
https://github.com/JorgePe/BOOSTreveng/blob/master/ColorDistanceSensor.md

I implemented in my own library (https://github.com/ysard/MyOwnBricks) the following colors:

COLOR_NONE 0xFF
COLOR_BLACK 0
COLOR_BLUE 3
COLOR_GREEN 5
COLOR_YELLOW 7
COLOR_RED 9
COLOR_WHITE 10

So there would be an inversion in the naming of the CYAN-GREEN colors here:

pylgbst/pylgbst/peripherals.py

Lines 19 to 20 in 6fc3bf4

	COLOR_CYAN = 0x05
	COLOR_GREEN = 0x06

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About the distance, I don't think it is represented in inches or cm since the data is supposed to be mapped from 0 to 10.

Source:
https://github.com/pybricks/pybricks-micropython/blob/5bf7d4e49ca084bfab3f8889642867b8c49e7a84/pybricks/pupdevices/pb_type_pupdevices_colordistancesensor.c#L115
and:
https://docs.pybricks.com/en/stable/pupdevices/colordistancesensor.html#pybricks.pupdevices.ColorDistanceSensor.distance

and:
JorgePe/BOOSTreveng#33 (comment)

Who is right?

Thanks for reading :p