##### 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
collections = context.CLIARGS['args']
        no_deps = context.CLIARGS['no_deps']
        download_path = context.CLIARGS['download_path']
        requirements_file = context.CLIARGS['requirements']
        if requirements_file:
            requirements_file = GalaxyCLI._resolve_path(requirements_file)
        requirements = self._require_one_of_collections_requirements(
            collections, requirements_file,
            artifacts_manager=artifacts_manager,
        )['collections']
        download_path = GalaxyCLI._resolve_path(download_path)
        b_download_path = to_bytes(download_path, errors='surrogate_or_strict')
        if not os.path.exists(b_download_path):
            os.makedirs(b_download_path)
        download_collections(
            requirements, download_path, self.api_servers, no_deps,
            context.CLIARGS['allow_pre_release'],
            artifacts_manager=artifacts_manager,
        )
        return 0
    def execute_init(self):