Add tools/seed-gitea.sh, which bootstraps the Gitea repo from BACKLOG.md:
the label taxonomy, the seven iteration milestones, and all 26 slice
issues (S-00..S-25). Driven by curl/jq against the Gitea API; reads
GITEA_TOKEN from the environment. Idempotent — every item is matched
before creation, so a partial or failed run can be re-run safely.
Document it in tools/README.md (prerequisites, usage, what it creates,
verification). Overlaps part of S-00's "labels/milestones exist in
Gitea" acceptance; the authoritative runbook moves to docs/ under S-00.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
