##### 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
options = super(GalaxyCLI, self).post_process_args(options)
        display.verbosity = options.verbosity
        return options
    def run(self):
        super(GalaxyCLI, self).run()
        self.galaxy = Galaxy()
        def server_config_def(section, key, required):
            return {
                'description': 'The %s of the %s Galaxy server' % (key, section),
                'ini': [
                    {
                        'section': 'galaxy_server.%s' % section,
                        'key': key,
                    }
                ],
                'env': [
                    {'name': 'ANSIBLE_GALAXY_SERVER_%s_%s' % (section.upper(), key.upper())},
                ],
                'required': required,
            }
        validate_certs_fallback = not context.CLIARGS['ignore_certs']
        galaxy_options = {}
        for optional_key in ['clear_response_cache', 'no_cache']: