Improve packaging and command line tools

* Declare paho-mqtt dependency as optional
* Fix ideenergy and ideenergy-mqtt CLI tools

ideenergy/__main__.py

@@ -18,10 +18,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 # USA.
 
-
-import asyncio
-
-from . import cli
+from .cli import main
 
 if __name__ == "__main__":
-    asyncio.run(cli.main())
+    main()

ideenergy/cli.py

@@ -107,7 +107,7 @@ async def get_historical_data(username, password, req_type, contract=None, logge
         return await client.get_historical_data(req_type, start, end)
 
 
-async def main():
+async def async_main():
     logging.basicConfig(
         format="%(asctime)s.%(msecs)03d %(levelname)s %(module)s %(message)s",
         datefmt="%Y-%m-%d %H:%M:%S",
@@ -163,5 +163,9 @@ async def main():
         print(pprint.pformat(historical))
 
 
+def main():
+    asyncio.run(async_main())
+
+
 if __name__ == "__main__":
-    asyncio.run(main())
+    main()

setup.cfg

@@ -24,6 +24,9 @@ python_requires = >=3.9
 install_requires =
    aiohttp
 
+[options.extras_require]
+mqtt = paho-mqtt >= 1.6.1
+
 [options.packages.find]
 where =