Documentation on how to validate all files on the CLI

[johentsch]

Overview

Currently, the relevant documentation page https://framework.frictionlessdata.io/docs/console/validate.html is showing only a single command (frictionless validate table.csv invalid.csv).

I have a directory tree with many CSV resources, each coming with its own JSON descriptor, and would like to go frictionless validate *.json. This, however results in

Could you please add documentation on how to achieve this?