Docs: Catalysts content suggestions

[marissahuysentruyt]

Should we include any language regarding our benchmarks directory? We also reference partials in the definition of catalysts on Directory Structure, but then didn't mention it on the Catalysts page.

FROM:

Your components live in the src/catalysts directory and can be organized however you wish. The catalysts themselves do not generate the documentations pages, rather that is done by its companion file found in src/docs.

TO:

Your components, benchmarks (like headings, lists, and paragraphs) and partials live in the src/catalysts directory and can be organized however you wish. The catalysts themselves do not generate the documentations pages. That is done by its companion file found in src/docs.