Provide previews of Readmes on search result pages

In a recent user study, we observed that users open the package page and close the tab immediately, when there is no clear Readme. If we provide a preview of Readme on the search result page, we can help users avoid visiting packages with low-quality Readme and save time for the searchers. Literature also suggests to use thumbnail representations of documents for rapid assessment of document relevance prior to selection. (Google Search removed it due to low usage, but our users may benefit by just seeing what headings or images a Readme page has.)

Start by locating the search-result page entry point and reviewing how package README information is currently represented. Clarify the preview's scope with maintainers, including whether it should show headings, images, or other thumbnail content; done means users can assess README quality without opening the package page.

Written by the indexing model from the issue text.