Document all supported resources for cloud providers

[xescugc]

Abstract

Right now if someone wants to know all the supported resources from an specific cloud provider they have to go to https://github.com/cycloidio/terracognita/blob/master/aws/resources.go#L38 or run terracognita {PROVIDER} resources. Would be good to have another place which is not code related to get that information.

Proposal

Autogenerate a file under docs/ with that list for each cloud provider and add the link to the README where we mention the providers we support so the list of resources would be easy accessible.

Implementation

Having an internal cli that with //go:generate will parse the Resources and generate a documentation with all of the resources for all the providers we support.

Open issues (if applicable)

[harold-i-kimmey]

I would be interested in working on this issue - initially for AWS provider