This data pack adds a new village type based on the pre-existing trail ruins introduced in Minecraft 1.20. These villages are meant to show what these ruins would've looked like in their golden age, before they ended up ruined and buried underground. This does however not overwrite the trail ruin generation, so you can still use this, even if you want to explore these underground digsites.
Make sure to add this data pack before generating a world so that the structures actually generate.
Also note that this structure is not 100% finished and might be updated in the future.