[Request] Add "Ask questions about page" to extension

[possdog]

Having the Summarize feature built into the extension is sensible and useful. It would make sense to do the same for the "Ask questions about page" feature available from the search result context menu. As far as I'm aware, this chat feature can only be accessed from within the search results (which is not helpful when you're already on the page you want to query), or via a bookmarklet (which I personally consider to be less of a solution and more of a workaround). By adding this feature directly to the extension, there will be a single go-to location for accessing Kagi's single-page AI features, thereby streamlining the user experience.