Renogy BT-1 BLE support

Renogy has a series of [MPTT solar charge controllers](https://www.renogy.com/wanderer-10a-pwm-charge-controller/).
They have an RS232 port that one can hook up a bluetooth module to: the [BT-1](https://www.renogy.com/bt-1-bluetooth-module-new-version/)

Apparently they use BLE and there's a project that decodes it: https://github.com/cyrils/renogy-bt1
I see what I think is some active pairing and the request construction is over here: https://github.com/cyrils/renogy-bt1/blob/main/renogybt/Utils.py#L54

With the recent Homeassistant / BLE / Esphome advances, I'm not sure if something like that would belong in Homeassistant or in Esphome, but I thought I'd open a feature request just in case other people are looking for it.