Add on (#212)

* added service to transfer Add-on config from options.json to config.toml

* added feature to get MQTT config from Homeassistant

current version is MVP. can run as Home Assistant Add-On, config.toml is automatically created from option parameters in the add-on configuration tab.

* fix pylance and flake8 warnings

* prepare building a ha addon

- move build script into root dir
- cp source files in addon build-tree

* ignore proxy source files in addon build tree

* move proxy source files in own directory

* remove duplicates source files from repro

* check for a valis SONAR_TOKEN

* rename add_on path

* prepare for unittests and coverage measurement

* move file cause of the changes pathname

* move the proxy dir to /home/proxy

* build addon with make now

* remove duplicated requirements.txt file from repo

* undo changes

---------

Co-authored-by: Michael Metz <michael.metz@siemens.com>
Co-authored-by: Stefan Allius <stefan.allius@t-online.de>

.vscode/settings.json

@@ -3,9 +3,11 @@
         "-vv", 
         "app",
         "--cov=app/src",
+        "--cov=ha_addon/rootfs/home",
         "--cov-report=xml",
         "--cov-report=html",
-        "system_tests"
+        "system_tests",
+        "ha_addon"
     ],
     "python.testing.unittestEnabled": false,
     "python.testing.pytestEnabled": true,