Generated docs cleanup (#3935)

Our generated docs are pretty verbose and space inefficient. This diff
has a few design tweaks to try and make sure that the information that's
emphasised is the stuff that's most important, and makes the typical
docs item use a bit less space in the process.


![image](https://github.com/tldraw/tldraw/assets/1489520/df433ae0-1400-4f5b-951e-e25869621a40)



### Change Type

- [x] `docs` — Changes to the documentation, examples, or templates.
- [x] `improvement` — Improving existing features

apps/docs/scripts/functions/generateSection.ts

@@ -118,6 +118,7 @@ export function generateSection(section: InputSection, articles: Articles, index
 					: isUncategorized
 						? `/${section.id}/${articleId}`
 						: `/${section.id}/${categoryId}/${articleId}`,
+			apiTags: parsed.data.apiTags ?? null,
 		}
 
 		if (isExamples) {