Add support for EZORTD

[tichris0]

Adding support for EZO RTD resistance temperature sensor

Description:

Adding support for EZO RTD. I tested it by simulating it with a pH device and changing the ID to recognize the pH device as a temperature device. According to the spec, it returns a float just like the pH device so I'm fairly confident that this will work on a real device. Properly tested to handle unit conversion.

Related issue (if applicable): fixes #

Checklist:

• The pull request is done against the latest dev branch
• Only relevant files were touched
• Only one feature/fix was added per PR.
• The code change is tested and works on Tasmota core ESP8266 V.2.7.4.3
• The code change is tested and works on core ESP32 V.1.12.2
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass