RFE: Check for namespace & collection name requirements when validating arguments

[alisonlhart]

ISSUE TYPE

• Feature Idea

SUMMARY

There are some limitations for collection namespaces and collection names, per the collection metadata structure documentation During the argument validation process, ansible-creator could output a warning or error to tell the user their <namespace.collection> input does not adhere to the naming requirements.

Also see: https://github.com/ansible/galaxy_ng/blob/dc62943bd9a59f600fe87d8d0eedec9f3ae41a4c/galaxy_ng/app/api/v3/serializers/namespace.py#L109-L122