Mentat

Currently, there is no linting of Jinja HTML templates. It would be nice to add it to the CI/CD pipeline. Djlint (https://www.djlint.com/) looks like the best option.

I think that we should also add a flake8-bugbear plugin to flake8, because it can catch some problematic mistakes.

Another thing to do could be to remove some of the disabled warning in flake8/pylint and try to correct the code.