Bump more copyright years (and fix the script)

Delete catalog-info.yaml

Move Github actions to Python 3.10

Rename 'master' branch to 'main'

Tweak requirements

Bump copyright years

Fix an XRC error regarding alignment flags

Update catalog-info.yaml

Create catalog-info.yaml for Backstage

Fix lint complaints

Update references to decommissioned thotkeeper.org website

Bump copyright years

Update README.md

Skip SCM admin directories when bumping copyright years

Fix some would-be linting errors.