[DoD] Review and refine content with SMEs

[aagonzales]

Accpectance criteria

• Vet code content checklist with devs The code checklist (esp. the API best practices) is pretty heavy at the moment; also, the testing checklist could potentially be broken up into another section. Have them review and try to simplify it.

• Vet design kit checklist with Juan and Rich This section is the most incomplete part of the checklist...probably because the Figma guild has it's own checklist for kit contributions and we're trying to kind of shorthand their checklist on our site. I think we need to decide whether we want to bring a shortened version of their checklist over here to the site, or just link out to it.

• Refine the content per feedback