Recursive mode & more detailed`ls`

[jkbrzt]

Allow to recursively list endpoints defined in a spec.

Context: https://discord.com/channels/725351238698270761/725351239487062029/799282198188130345

Maybe ls -r, ls -la.

[ptitpoulpe]

Maybe could be good also to add more informations with ls -something to show methods, parameters, return type