Document all commands

[fraxken]

The current documentation is quite incomplete, and many commands of the tool, such as the report command, are not documented.

My idea is to keep the usage example section, but instead of including numerous tables, we could create separate documentation for each command (in a folder /docs/cli/ for example).

All commands are defined here: https://github.com/NodeSecure/cli/blob/master/bin/index.js

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A bit like jsonschema CLI README:

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[Code-Hacker26]

Hey , I am interested in contributing to this issue ,
It wouls be great if You can thow some more light to it

[fraxken]

@Code-Hacker26 Someone is already working on it (he just didn't comment here to take ownership)