Search only searches questions, answers, and articles #1703
Description
Our search logic enumerates the post types to search, I guess so that we won't pick up things like policy docs. However, this means that new post types defined through the UI, such as wiki, are also not included in search results. You can confirm this on the Proposals community by searching for "renovating", a word that appears in the description (wiki, Descriptions category) for Home Improvement. Today this search returns 0 results.
If we want to restrict post types for general search (which does seem like a good idea), let's do it with an exclude list, not an include list. (For searching help/policy docs, see #1328.)