task: Investigate spell checker

[michael-wisely-gravwell]

What needs to be done?

Check out https://github.com/sphinx-contrib/spelling

Why is this task needed?

Catch spelling mistakes in an automated way. Maybe include as a CI job.

Any other comments?

Looks like I'd started working on an aspell thing in nix a while back. Might be a helpful start.

[kris-watts-gravwell]

I feel attacked....