fix: rebuild dist on prepack so publishes carry the bumped version

[pyramation]

Summary

One line per makage package, matching what every constructive-io/constructive package already does:

+"prepack": "npm run build"

That is why last night's lerna publish only landed the five @constructive-io/* packages. These six publish from dist, lerna version bumps only the source manifest, and nothing rebuilt dist — so npm got the pre-bump version number with the new code (blocks-schema@0.2.1 is really 0.3.0's code, blocks-renderer@0.1.2 is really 0.2.0's) and json-renderer failed outright because its dist still said 0.0.1. The same missing rebuild is why "json-renderer": "workspace:^" reached npm: lerna resolves workspace ranges in the source manifest, and prepack is what copies that resolved manifest into dist. @constructive-io/cli publishes with ^5.18.3 deps for exactly this reason.

json-renderer@0.1.0 and the other five bumped versions are still unpublished and now publish correctly. blocks-schema@0.2.1 and blocks-renderer@0.1.1/0.1.2 are immutable and carry workspace: deps — worth npm deprecate-ing once the good versions are out.

pnpm check passes.

Link to Devin session: https://app.devin.ai/sessions/027937d092794c92a31c6ee49c513f59
Requested by: @pyramation

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[tenki-reviewer]

Review complete. No issues found — approved ✅.

---

This PR wires up the makage dist-layout publishing flow for the six packages on the publish-from-dist layout. It adds prepack: pnpm build hooks to the source manifests, introduces scripts/resolve-dist-workspace-deps.mjs to rewrite workspace: ranges in the copied dist/package.json, adds scripts/check-dist-manifests.ts as a gate that verifies each package's dist/package.json matches its source manifest and enforces the publishConfig.directory invariant, and documents the release process in docs/RELEASING.md.

Files	Change
package.json, packages/*/package.json (6 makage packages)	Adds prepack build hooks and check:dist-manifests to the check gate
scripts/resolve-dist-workspace-deps.mjs	New resolver that copies source manifests to dist/ and rewrites workspace: protocol ranges
scripts/check-dist-manifests.ts	New gate validating dist manifest consistency and publish directory invariant
docs/RELEASING.md	Documents the makage dist-layout build and publish sequence

No high-confidence defects were found; two low-confidence observations (unguarded source manifest read, and the published tarball shipping the prepack hook) fell below the confidence threshold and are not reported as findings.

_{Reviewed commit: fa71044}