convert "schwarz.mailqueue.cli" into package

I am planning to add more cli scripts and putting all of that code into
a single module is less readable.

schwarz/mailqueue/cli/__init__.py

@@ -0,0 +1,3 @@
+
+from .one_shot_queue_run import *
+from .send_test_message import *

schwarz/mailqueue/cli/one_shot_queue_run.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: MIT
+
+import sys
+
+import docopt
+
+from ..queue_runner import one_shot_queue_run
+
+
+__all__ = [
+    'one_shot_queue_run_main',
+]
+
+def one_shot_queue_run_main(argv=sys.argv, return_rc_code=False):
+    """mq-run.
+
+    Usage:
+        mq-run [options] <config> <queue_dir>
+
+    Options:
+        --verbose -v    more verbose program output
+    """
+    arguments = docopt.docopt(one_shot_queue_run_main.__doc__, argv=argv[1:])
+    config_path = arguments['<config>']
+    queue_dir = arguments['<queue_dir>']
+    cli_options = {
+        'verbose': arguments['--verbose'],
+    }
+    one_shot_queue_run(queue_dir, config_path, options=cli_options)
+    exit_code = 0
+    return exit_code if (return_rc_code) else sys.exit(exit_code)

schwarz/mailqueue/cli.py → schwarz/mailqueue/cli/send_test_message.py

@@ -5,35 +5,13 @@
 
 import docopt
 
-from .mailflow_check import send_test_message
-from .queue_runner import one_shot_queue_run
+from ..mailflow_check import send_test_message
 
 
 __all__ = [
-    'one_shot_queue_run_main',
     'send_test_message_main',
 ]
 
-def one_shot_queue_run_main(argv=sys.argv, return_rc_code=False):
-    """mq-run.
-
-    Usage:
-        mq-run [options] <config> <queue_dir>
-
-    Options:
-        --verbose -v    more verbose program output
-    """
-    arguments = docopt.docopt(one_shot_queue_run_main.__doc__, argv=argv[1:])
-    config_path = arguments['<config>']
-    queue_dir = arguments['<queue_dir>']
-    cli_options = {
-        'verbose': arguments['--verbose'],
-    }
-    one_shot_queue_run(queue_dir, config_path, options=cli_options)
-    exit_code = 0
-    return exit_code if (return_rc_code) else sys.exit(exit_code)
-
-
 def send_test_message_main(argv=sys.argv, return_rc_code=False):
     """mq-send-test.