Add adafruit_OPT4048 #103

Job	Run time
scheduler	55s
mpy-cross-mac	26s
docs	4m 15s
tests / run (mpy)	42s
windows-zephyr	0s
tests / run (all)	1m 1s
mpy-cross / build (static-aarch64)	38s
tests / run (native)	47s
mpy-cross / build (static)	21s
mpy-cross / build (static-raspbian)	50s
mpy-cross / build (static-mingw)	45s
tests / run (native_mpy)	46s
windows	-1s
ports (raspberrypi) / board (cytron_edu_pico_v2_2w)	12s
	11m 37s

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