yml tests

The linter test for python black (that seems to be working!!) and a build test that can have some problems with virtual environment for python (I am not sure about the directory and if the environment should be added to the root of the container or not). The build test pipeline should be working at least to the point of going to the end without errors (today I've suddenly encountered a problem with a daemon permission on the $ docker run --rm -v $(pwd):/home/ws my-app:latest /bin/bash -c "source /opt/ros/humble/setup.bash" line while testing it on the test project, which is weird because I did not change the code at all and it was running without this error before)