Create async electrical_protocol driver

[cbrxyz]

What needs to change?

Currently, we have a synchronous version of the serial driver used by electrical_protocol. However, it would be great to have an asynchronous version of this driver. This would empower us to combine our electrical drivers with other forms of I/O (including ROS nodes/topics/etc.).

This could be done by copying the current synchronous driver and replacing the synchronous parts with pyserial-asyncio and asyncio. I also made some brief starting progress on this task on this branch.

How would this task be tested?

1. Copy the current test cases for the synchronous driver and ensure that the test cases also pass in the asynchronous version.

[MarcinPlaza]

Well sad moment, I thought I would finish by this week :( hurricane threw a wrench in my plans. But I believe my async version of the tests is working but for some reason the simulated device refuses to connect so now I am working on fixing that.

[MarcinPlaza]

I have pushed my attempt to a new branch called electrical-protocol-async-v2, for now I have left an "Async_readme.txt" to bring whoever comes next up to speed. Note: I cannot promise the validity of any of the code so please assume it might be wrong.