chore: prepare json-document 1.1.0-rc.0

[developer-1px]

Summary

• prepare @interactive-os/json-document@1.1.0-rc.0 as an integration prerelease
• keep npm latest on 1.0.1 and publish the RC through the next dist-tag
• document the candidate unified mutation result shape and its prerelease compatibility boundary
• add a tag-gated OIDC/provenance publish workflow for json-document-v*-rc.*

Verification

• npm run release:check
• 457 core tests passed, 4 skipped
• 41 extension labs verified
• app/site typechecks, tests, production builds, Pages smoke, and 5 Playwright tests passed
• standard conformance and 10k/50k core benchmarks passed
• packed artifact audited: 202 allowlisted files, 127.1 kB, no tests/source maps/node_modules

Release

After merge, tag the merged commit as json-document-v1.1.0-rc.0. The publish workflow requires the tagged commit to be on main and publishes only with --tag next --provenance.