ci: add CodeQL workflow for GitHub code scanning (#822)
ci: add CodeQL workflow for GitHub code scanning (#822)

Co-authored-by: LGTM Migrator <cbd4c9bf40062c49335cf6af5ebe4d3abe37f758@users.noreply.github.com>
Co-authored-by: Erik Bjäreholt <089fdadd1760f62b8d2d22122c3eb081b31e1e1a@gmail.com>
ActivityWatch/activitywatch,ErikBjare/activitywatch