kyle/radon-ble-rd200: Poll the rd200 over ble and get the most recent radon samples. Device is made by EcoSense and has pretty bad user interface, this replaces that.

Koyle Coil 06f983da10 initial		%!s(int64=3) %!d(string=hai) anos
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FTLAB-RadonEye-Plus-2-manual-EN.pdf	06f983da10 initial	%!s(int64=3) %!d(string=hai) anos
radon-eye-manual.pdf	06f983da10 initial	%!s(int64=3) %!d(string=hai) anos