W2cleanup

[trentgill]

What does this PR do?

Completes PR #235 by @kfirmanty

Finishes documentation and clarifies some naming.

Provide links to any related discussion on lines.

How should this be manually tested?

It has been tested by running through each of the commands connected to W/ with latest firmware. Further testing would be very welcome.

Any background context you want to provide?

If the related Github issues aren't referenced in your commits, please link to them here.

I have,

• [X] updated CHANGELOG.md
• [X] updated the documentation
• [ ] updated help_mode.c (if applicable)
• [X] run make format on each commit
• [X] run tests

[scanner-darkly]

thanks for including disting in the cheatsheet! there is also onboard help (which is in help_mode.c), will leave it up to you whether to include it or not

[scanner-darkly]

do we still need https://github.com/monome/teletype/pull/235 or can it be closed?