Improving the calibration process

[neilramaswamy]

Currently, the calibration user-experience isn't the best:

1. The prompts are somewhat confusing if you haven't seen them before. The input prompts are fairly vague.
2. We ask questions that aren't exactly needed. For example, the mapper asks what direction the light are going in. They are always going to be horizontal because of how the hardware was made.
3. We ask for the corner, but the corner is ALWAYS the top left or the bottom right.

We should do two things as part of this issue:

• We should clarify/simplify these questions in the interactive calibration process, whenever possible.
• We should split out the tests in the mapper file into actual unit tests, and run them as part of CI (I think GitHub Actions should work, but I'm happy to sponsor this project if needed).

[neilramaswamy]

@Hammad-Izhar perhaps you might be interested in this?