Update the documentation

[usrGabriel]

There has been updates that added additional features to the Ansible modules and there is no documentation to help us know how to use these features without digging through the code itself.

It would be a great addition to update this documentation repo and include the latest changes in them to facilitate the use of the modules.

Thanks for making these Ansible modules, hoping to see this documentation updated soon! I may do PRs myself to help out if I have some time soon. I encourage anyone reading this that is using undocumented features to do the same if they can.

[usrGabriel]

Exemple of one of the undocumented features: Support for connection args in ntc_config_command