Consider linting line length in code blocks

[Eric-Arellano]

Long lines are annoying because they result in horizontal scrolling inside the code block. We should consider using a linter (like Ruff or Pylint) to ensure that code blocks are not too long. Although, this would be hard to run on MDX files, so it might be simpler to implement our own linter that uses our markdownReader.ts.

TBD what the line length should be. It'd be helpful to experiment with what is an optimal size when using our docs size, where we avoid scrolling but still use all the real estate. This experiment should consider different screen sizes.

[frankharkins]

For mdx, we could consider mdformat: https://docs.astral.sh/ruff/integrations/#mdformat