Suggestion: Allow players to stand on all mobs

I suggest adding collision to the top of all mobs to allow players and entities to stand on them, similar to how Shulkers work.
This would allow for more creative gameplay and parkour elements. Currently, it feels unnatural that players just slide through mobs instead of being able to stand on them.

I suggest starting with larger mobs that have flat surfaces, and eventually expanding this collision to all mobs. It should function similarly to how Shulkers or Boats currently work.