Update CI for formatting/linting

Copying comment from !60 (merged). We should add more CI checks (e.g for linting and formatting), and then people can decide for themselves whether they use devcontainer or other means to check compliance with linters and formatters locally.

In the Ntupling Service we use a Makefile where you can run scripts like make tidy and make audit: https://gitlab.cern.ch/cernopendata/lhcb-ntupling-service-backend/-/merge_requests/22/diffs. This could be a nice setup to use for the Ntuple Wizard as well.

Thanks for the suggestion @drosenda. Feel free to elaborate.