Oriental Motor BLH controller agent for stimulator

[dixilo]

Description

This pull request adds a new agent to operate motor to be used in the stimulator for LAT.
The motor cotroller is Orienta Motor's BLH series with USB controll capability.
This agent communicate with the controller to start or stop rotation and change parameter settings such as rotation speed.

Motivation and Context

Since the BLH series motor controller will be used in the LAT stimulator,
the agent should be contained in this repository.

How Has This Been Tested?

Test was done using an actual motor controller and an ARM-based single board computer.

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.