* add some reader classes to get the configuration
* adapt unittests
* get config from json or toml file
* loop over all config readers to get the configuration
* rename config test files
* use relative paths for coverage test in vscode
* do not throw an error for missing config files
* remove obsolete tests
* use dotted key notation for pv sub dictonary
* log config reading progress
* remove create_config_toml.py
* remove obsolete tests for the ha_addon
* disable mosquitto tests if the server is down
* ignore main method for test coverage
* increase test coverage
* pytest-cov: use relative_files only on github, so coverage will work with vscode locally
* remove unneeded imports
* add missing test cases
* disable branch coverage, cause its not reachable
