EufyLife Support C20 scale

I just bought this new C20 scale and got very excited when I saw there was a local integration.

Sadly, it is not recognised by the bluetooth integration (which works for other devices). It is not listed as supported on the integration page, so that does make sense, but I kinda assumed it would have the same API as the others (since this just appears to be an updated C1).

I’ve also made a request on the ble_client github page.