##### 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.api_servers.append(GalaxyAPI(
                    self.galaxy, 'cmd_arg', cmd_server, token=cmd_token,
                    priority=len(config_servers) + 1,
                    **galaxy_options
                ))
        else:
            self.api_servers = config_servers
        
        if len(self.api_servers) == 0:
            self.api_servers.append(GalaxyAPI(
                self.galaxy, 'default', C.GALAXY_SERVER, token=cmd_token,
                priority=0,
                **galaxy_options
            ))
        return context.CLIARGS['func']()
    @property
    def api(self):
        if self._api:
            return self._api
        for server in self.api_servers:
            try:
                if u'v1' in server.available_api_versions:
                    self._api = server
                    break
            except Exception:
                continue
        if not self._api:
            self._api = self.api_servers[0]
        return self._api
    def _get_default_collection_path(self):