### Description

Recently, we added [a new DAG dependencies view](https://github.com/apache/airflow/pull/13199) to the webserver. It would be helpful if a similar diagram could also be displayed/generated using the CLI. For now, only [one DAG can be displayed](http://airflow.apache.org/docs/apache-airflow/stable/usage-cli.html#exporting-dag-structure-as-an-image) using CLI.
![image](https://user-images.githubusercontent.com/12058428/137945580-6a33f919-2648-4980-bd2c-b40cfcacc9fe.png)

If anyone is interested, I will be happy to help with the review.

### Use case/motivation

* Keep parity between CLI and web serwer.
* Enable the writing of scripts that use these diagrams, e.g. for attaching in the documentation.

### Related issues

https://github.com/apache/airflow/pull/13199/files

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

airflow/cli/commands/dag_command.py
"""
    Returns the state (and conf if exists) of a DagRun at the command line.
    >>> airflow dags state tutorial 2015-01-01T00:00:00.000000
    running
    >>> airflow dags state a_dag_with_conf_passed 2015-01-01T00:00:00.000000
    failed, {"name": "bob", "age": "42"}
    """
    if args.subdir:
        dag = get_dag(args.subdir, args.dag_id)
    else:
        dag = get_dag_by_file_location(args.dag_id)
    dr = DagRun.find(dag.dag_id, execution_date=args.execution_date)
    out = dr[0].state if dr else None
    conf_out = ''
    if out and dr[0].conf:
        conf_out = ', ' + json.dumps(dr[0].conf)
    print(str(out) + conf_out)
@cli_utils.action_logging
def dag_next_execution(args):
    """
    Returns the next execution datetime of a DAG at the command line.
    >>> airflow dags next-execution tutorial
    2018-08-31 10:38:00
    """
    dag = get_dag(args.subdir, args.dag_id)
    if dag.get_is_paused():
        print("[INFO] Please be reminded this DAG is PAUSED now.", file=sys.stderr)
    with create_session() as session:
        max_date_subq = (