Show compatible Producer (aka content) snaps in Consumer snap page #5240
Description
Counterpart of ubuntu/app-center#1954
Description of the feature
Thanks to the content interface (https://snapcraft.io/docs/content-interface) it is possible to "inject" content from producer snaps in consumer snaps in a similar manner to what is done with Flatpak extension points.
On Flathub, extension points are evident because it is possible to see which extensions are compatible with said flatpak. For example (https://flathub.org/apps/org.gimp.GIMP):
On snapcraft.io, however, there is no such information like on Flathub. So, to install a consumer snap the user needs to previously know it, search it then install it like regular snaps.
Use case
Displaying a list of producer snaps on the consumer snap page would make way easier to regular users to install and connect such snaps when available. That would also increase the visibility of that feature for developers.