Adding lint checker and formatter to Test Observer

Test Observer currently has lots of lint checker in its github actions (backend, frontend, terraform, readthedocs), but no scripts to automatically perform lint check and format.

It would be nice to have lint.sh and format.sh scripts as sanity checks as apart of the repo.

Start by reading the existing GitHub Actions lint jobs for the backend, frontend, Terraform, and Read the Docs components, then identify the commands they run. Add lint.sh and format.sh at the repository level so they provide local sanity checks matching those jobs, and verify both scripts run successfully.

Written by the indexing model from the issue text.