Create Docs with executable code. (Jupyter notebook-like)

[mustafab0]

Need to use @leshy docs stuff such that people can actually run code in the docs. I forget what its called but basicaly makes docs like jupyter notebook and checks that all code in docs is actually executable and passes tests. So docs code will never break with new PRs

Originally posted by @spomichter in #970 (comment)

[linear]

DIM-355

[leshy]

yes great, tell your agent to read docs/agents/docs.md for instructions, you can get executable code blocks etc, talk to me if you have problems