refactor: migrate BaseBlocks to OpenEditor 0.0.53

[naaiyy]

Summary

• migrate every BaseBlocks consumer from the retired OpenEditor package names to the nine-package 0.0.53 surface
• remove unused OpenEditor and domain dependencies from @baseblocks/openeditor-contracts while keeping BaseBlocks-owned document, block, projection, and export adapters
• regenerate bun.lock and update the Bun release-age allowlist

Verification

• bun install
• bun run check-types
• bun run test (301 passed)
• bun run build
• bunx biome check .
• npx -y react-doctor@latest . --verbose --diff (no issues)
• repository-wide hidden-file consumer audit across BaseBlocks-HQ found no retired OpenEditor package references outside OpenEditor itself

[vercel]

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Project	Deployment	Actions	Updated (UTC)
base-blocks	Ready	Preview	Aug 31, 2026 8:48am

[github-actions]

React Doctor found no new issues. 🎉

_{Reviewed by React Doctor for commit 91c9f68.}