Update tooling for the new docs/<subfolder>/ layout:
- scripts/generate-docs-index.mjs walks the 8 subfolders in defined order and
emits fileName values relative to docs/ (e.g. "architecture/ARCHITECTURE.md").
- scripts/check-docs-sync.mjs reads docs/reference/openapi.yaml.
- scripts/check-docs-counts-sync.mjs targets new doc paths.
- scripts/check-env-doc-sync.mjs reads docs/reference/ENVIRONMENT.md.
- scripts/gen-provider-reference.ts writes to docs/reference/PROVIDER_REFERENCE.md.
- scripts/pack-artifact-policy.ts allowlists docs/reference/openapi.yaml.
- New scripts/docs/{fix-internal-links,move-i18n-mirrors}.mjs are one-shot
FASE 3 helpers, safe to delete after merge.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
