Enhance MTreg as config for BH1750

[cYnd]

Component name

BH1750

Link to component documentation on our website

https://esphome.io/components/sensor/bh1750/

Describe the enhancement

In the datasheet of the BH1750 it is specified that with MTreg the sensor sensitivity can be shifted:

https://www.mouser.de/datasheet/2/348/Rohm_11162017_ROHMS34826-1-1279292.pdf (page 11).

Currently it seems that this is not supported by ESPHome.

Use cases

I want to turn on some lights in my basement depending on a motion sensor in combination with the brightness. On a usual summer/bright day I don't need the lights to be turned on when there is motion but on a rainy day it might be too dark and quite nice to control this via the BH1750.

Since I use the BH1750 inside and in a dark corner, the default MTreg of 69 ouputs quite small lux values and I would like to use bigger values for better controlling.

Anything else?

THere is already a Repo implementing this, I do not know how usefull this is however: https://github.com/claws/BH1750

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🏷️ I've automatically added the component: bh1750 label to help categorize this feature request.