##### SUMMARY

When I run `ansible-galaxy [type] init`, I would like to be able to use my own configured 'skeleton' to init that content.

For Ansible roles, when running `ansible-galaxy role init myrole`, I can configure a [`GALAXY_ROLE_SKELETON`](https://docs.ansible.com/ansible/latest/reference_appendices/config.html#galaxy-role-skeleton) in my `ansible.cfg`, and the init command will use that skeleton as the source for the new role.

For Ansible collections, currently there's a bug (https://github.com/ansible/ansible/issues/66255) that causes collections to use that skeleton if its set (which can lead to some confusion)—but once that bug's fixed, there's no way to specify a skeleton for a collection.

So this feature request is to add a new configuration option `GALAXY_COLLECTION_SKELETON` (environment variable `ANSIBLE_GALAXY_COLLECTION_SKELETON`) which allows a collection skeleton to be specified.

Note: the docs for `GALAXY_ROLE_SKELETON` currently state:

> Role or collection skeleton directory to use as a template for the `init` action in `ansible-galaxy`, same as `--role-skeleton`.

Therefore that would need adjusting too, if the previously mentioned bug doesn't fix that.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME

ansible-galaxy init

##### ADDITIONAL INFORMATION

N/A
self, collections, requirements_file,
            artifacts_manager=None,
    ):
        if collections and requirements_file:
            raise AnsibleError("The positional collection_name arg and --requirements-file are mutually exclusive.")
        elif not collections and not requirements_file:
            raise AnsibleError("You must specify a collection name or a requirements file.")
        elif requirements_file:
            requirements_file = GalaxyCLI._resolve_path(requirements_file)
            requirements = self._parse_requirements_file(
                requirements_file,
                allow_old_format=False,
                artifacts_manager=artifacts_manager,
            )
        else:
            requirements = {
                'collections': [
                    Requirement.from_string(coll_input, artifacts_manager)
                    for coll_input in collections
                ],
                'roles': [],
            }
        return requirements
    
    
    
    def execute_role(self):