SEN0658 weather station for RAK4631

[johnterickson]

Adds support for SEN0658 Ultrasonic 9-in-1 RS485 Weather Sensor to the RAK4631.

Test configuration:

RS485 adapter	RAK4630 on RAK19003 Mini Base Board
Blue	RX0
Green	TX0
Black	GND
Red	+ pin of battery connector

SEN0658	RS485 adapter
Brown	12V
Black	GND
Yellow	RS485 A
Blue	RS485 B

There's not perfect mappings for the sensors so what I have is:

Match	Telemetry Sensor	Actual Sensor
YES	Temperature	"
YES	Humidity	"
YES	Air Pressure	"
YES	Luminosity	"
NO	Concentration	PPM 10
NO	Distance (m)	Wind Speed (m/s)
NO	Direction (degrees)	Wind Direction (degrees)
NO	Analog Input	PPM 2.5
NO	Generic	Noise dB