### Description

Currently, the `airflow variables export` command requires an explicit file path and does not support output to stdout. However connections can be printed to stdout using `airflow connections export -`. This inconsistency between the two export commands can lead to confusion and limits the flexibility of the variables export command.

### Use case/motivation

To bring some consistency, similar to connections, variables should also be printed to STDOUT, using `-` instead of filename. 

### Related issues

_No response_

### Are you willing to submit a PR?

- [X] 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)

)
CONFIG_COMMANDS = (
    ActionCommand(
        name="get-value",
        help="Print the value of the configuration",
        func=lazy_load_command("airflow.cli.commands.config_command.get_value"),
        args=(
            ARG_SECTION,
            ARG_OPTION,
            ARG_VERBOSE,
        ),
    ),
    ActionCommand(
        name="list",
        help="List options for the configuration",
        func=lazy_load_command("airflow.cli.commands.config_command.show_config"),
        args=(
            ARG_OPTIONAL_SECTION,
            ARG_COLOR,
            ARG_INCLUDE_DESCRIPTIONS,
            ARG_INCLUDE_EXAMPLES,
            ARG_INCLUDE_SOURCES,
            ARG_INCLUDE_ENV_VARS,
            ARG_COMMENT_OUT_EVERYTHING,
            ARG_EXCLUDE_PROVIDERS,
            ARG_DEFAULTS,
            ARG_VERBOSE,
        ),
    ),
)