S allius/pytest (#211)

* - fix pytest setup that can be startet from the rootdir
  - support python venv environment
  - add pytest.ini
  - move common settings from .vscode/settings.json into pytest.ini
  - add missing requirements
  - fix import paths for pytests

* - support python venv environment

* initial version

* - add missing requirements python-dotenv

* fix import paths for pytests

* fix pytest warnings

* initial version

* report 5 slowest test durations

* add more vscode settings for python

app/src/gen3plus/solarman_emu.py

@@ -1,16 +1,10 @@
 import logging
 import struct
 
-if __name__ == "app.src.gen3plus.solarman_emu":
-    from app.src.async_ifc import AsyncIfc
-    from app.src.gen3plus.solarman_v5 import SolarmanBase
-    from app.src.my_timer import Timer
-    from app.src.infos import Register
-else:  # pragma: no cover
-    from async_ifc import AsyncIfc
-    from gen3plus.solarman_v5 import SolarmanBase
-    from my_timer import Timer
-    from infos import Register
+from async_ifc import AsyncIfc
+from gen3plus.solarman_v5 import SolarmanBase
+from my_timer import Timer
+from infos import Register
 
 logger = logging.getLogger('msg')