tap 0.1.0

Changes

• Add a CI workflow: build, test and commit trailers (73fe498)
• Add notices, AI.md and CONTRIBUTING.md; drop pack.sh (a872371)
• Use the porthole-dev organisation for the app ID and links (0b8d8b5)
• An NFC application for the portal (3e3aaeb)

The source archive's provenance, where attested, is verified with
gh attestation verify <archive> -R porthole-dev/tap.