docs as val?

[pmillspaugh]

See README and TODOs here:
https://www.val.town/x/petermillspaugh/docs

More feedback:

• Navigation is super slow: big downgrade from the immediacy of the old docs. Solvable (start with moving this line outside of any route: https://www.val.town/x/petermillspaugh/docs/code/index.tsx#L14)
• Design feels janky
• Plan for migrating all docs.val.town content
• Search in old blog is very good - need parity