https://github.com/apache/airflow/pull/27892 added Internal API as part of Webserver.

We need to introduce `airlfow internal-api` CLI command that starts Internal API as a independent component.
default=conf.get("celery", "FLOWER_BASIC_AUTH"),
    help=(
        "Securing Flower with Basic Authentication. "
        "Accepts user:password pairs separated by a comma. "
        "Example: flower_basic_auth = user1:password1,user2:password2"
    ),
)
ARG_TASK_PARAMS = Arg(("-t", "--task-params"), help="Sends a JSON params dict to the task")
ARG_POST_MORTEM = Arg(
    ("-m", "--post-mortem"), action="store_true", help="Open debugger on uncaught exception"
)
ARG_ENV_VARS = Arg(
    ("--env-vars",),
    help="Set env var in both parsing time and runtime for each of entry supplied in a JSON dict",
    type=json.loads,
)
ARG_CONN_ID = Arg(("conn_id",), help="Connection id, required to get/add/delete a connection", type=str)
ARG_CONN_ID_FILTER = Arg(
    ("--conn-id",), help="If passed, only items with the specified connection ID will be displayed", type=str
)
ARG_CONN_URI = Arg(
    ("--conn-uri",), help="Connection URI, required to add a connection without conn_type", type=str
)
ARG_CONN_JSON = Arg(
    ("--conn-json",), help="Connection JSON, required to add a connection using JSON representation", type=str
)
ARG_CONN_TYPE = Arg(
    ("--conn-type",), help="Connection type, required to add a connection without conn_uri", type=str
)
ARG_CONN_DESCRIPTION = Arg(