Docs style guide

[PaulRBerg]

See Optimism's guide:

https://docs.optimism.io/connect/contribute/style-guide

[github-actions[bot]]

This issue is stale because it has been open 365 days with no activity. Leave a comment or remove the "stale" label, otherwise this will be closed in 14 days.

[PaulRBerg]

Would like to keep this open but our style guide shouldn't be as verbose as Optimism's. Many of Optimism's rules can be enforced via a Markdown formatter like Prettier.