fix: fix 'bad array subscript' error (#62) * fix: fix 'bad array subscript' error This commit fixes the 'bad array subscript' error that is thrown when no python files are found (see https://github.com/rickstaa/panda-gazebo/actions/runs/5269309929/jobs/9527260724). It also simplifies the codebase. * feat: add empty folder warning/variable and verbose option This commit adds the EMPTY_FOLDER environment variable which can be used to check if the folder that was specified was empty. It now also throws a warning in the github action console when no files are found. Lastly, the `verbose` input argument was added which allows people to print the black output to the github action console. It also adds a test to see if the empty folder check works. * fix: fix verbose input bug * fix: upload empty folder * test: fix verbose test * feat: remove EMPTY_FOLDER env variable * fix: fix warning color * fix: uncomment code * fix: remove test code