Adding stimulator thermometer agent.

[dixilo]

Description

This is a PR to add stimulator thermometer agent.

Motivation and Context

The stimulator is equiped with original thermometer readout based on MAX31856 and MAX31865.
This agent add functionality to read these devices via Industrial I/O subsystem equipped in Linux kernel.

How Has This Been Tested?

The functionality was tested using the actual MAX31856 and MAX31865 devices.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[davidvng]

Thank you for the PR! This looks good overall, just some comments for consistency that are similar to my previous review.

Also double checking that this agent will also run on a dedicated computer that connects to these devices via USB, like the BLHAgent?

[BrianJKoopman]

A few small comments in addition to @davidvng's.

[dixilo]

Also double checking that this agent will also run on a dedicated computer that connects to these devices via USB, like the BLHAgent?

It runs on a dedicated computer (KR260) like BLHAgent.
KR260 has GPIO pins like Raspberry Pis and it will use these pins to read the devices (MAX31856/MAX31865) via SPI protocol (not via USB connection).