Add crumtrail to command pages.

[savente93]

Currently it is a bit hard to navigate around the docs vertically. for example let's say I just searched for path expand and it's close but not exactly want I want. I want to look around the other path subcommands to see if I can see something that works better. currently there is no way to navigate up one part. This makes it even harder if it's not clear which subsection something is under (e.g. get I for the life of me cannot find it's parent page). not being able to navigate up in the tree makes navigation very difficult imo