let baritone walk on slab

## Describe your suggestion
let baritone walk on slab placed at bottom (like half block) and placed at the top of the block (i dindn't test this so it can be already a thing)
this apply to snow (not block) too

(if there's needed to separe this suggestion i will do it)

## Final checklist
- [x] I know how to properly use check boxes
- [x] I have not used any OwO's or UwU's in this issue.
- [ ] slab at bottom
- [ ] slab at top
- [ ] snow