Support for ForA Hanabi-series video switchers

[jstarpl]

• I'm submitting a ...

• bug report
• feature request
• question about the decisions made in the repository
• question about how to use this project

• Summary

ForA Hanabi-series vision mixers officially only support GVG100 & BVS-300/DVS protocol over serial for automation control, but internally also support a WebSocket protocol for control. This protocol has been reverse-engineered and is used in a Bitfocus Companion module. In order to be useful in a Sofie context, the module should support cross-point control, M/E control (auto takes, cuts, transition style change) and Key state control.

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. StackOverflow, personal fork, etc.)

Bitfocus Companion module: https://github.com/bitfocus/companion-module-fora-hvs