yaml-pro contains a new mode which provides conveniences when
editing YAML.  Running `yaml-pro-mode' switches the mode and the
following commands are available:
- `yaml-pro-move-subtree-up' and `yaml-pro-move-subtree-down'
- `yaml-pro-next-subtree' and `yaml-pro-prev-subtree',
- `yaml-pro-kill-subtree'
- `yaml-pro-up-level'
- `yaml-pro-fold-at-point' and `yaml-pro-unfold-at-point'.
- `yaml-pro-edit-scalar'
- `yaml-pro-jump' or if consult exists `yaml-pro-consult-jump'