As others are hinting at, there’s really no realistic way to add photos or menus to OSM today. I believe photos will always be out of scope for vanilla OSM, and manually adding menus is too tedious to do at scale even if there were standard tags for it. Perhaps there needs to be a universally accepted secondary repository where people can upload photos related to OSM nodes, and then clients would need to know to check that secondary source when the user is viewing a restaurant’s details.

I hate to say it, but until we have something like that, Google Maps are simply the better (only?) place to have this.