add some tests, commands and bus class

added a couple of lower tests.

add some string tests to higher tests.

added bus class

add higher commands show, hide, shutdown, restart, version and type

tests/__init__.py

@@ -1,5 +1,6 @@
 import vban_cmd
 from vban_cmd import kinds
+from vban_cmd.channel import Modes
 import socket
 from threading import Thread
 
@@ -13,5 +14,7 @@ def setup_package():
     tests.worker = Thread(target=tests._send_register_rt, daemon=True)
     tests.worker.start()
 
+    tests._modes = Modes()
+
 def teardown_package():
     pass