Now that the mirror-ci-image workflow has populated GHCR, switch .github/env from docker.io/paritytech/ci-unified to our own ghcr.io/pezkuwichain/ci-unified mirror.
- Add 72 rebrand workflow files (polkadot→pezkuwi, substrate→bizinikiwi, cumulus→pezcumulus) - Add GitHub actions, issue templates, and configs - Removed unnecessary workflows (fork-sync, gitspiegel, upstream-tracker, sync-templates, backport) - Renamed zombienet test files to match new naming convention
pezkuwichain