chore(harness): centralize storybook and release entrypoints

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

package.json

@@ -8,7 +8,7 @@
   },
   "scripts": {
     "build": "pnpm --filter @ai-ui/tokens build && pnpm --filter @ai-ui/ui build",
-    "build:docs": "pnpm --dir apps/docs run build-storybook",
+    "build:docs": "node ./scripts/harness/build-storybook.mjs",
     "changeset": "changeset",
     "changeset:status": "changeset status --verbose",
     "dev:docs": "pnpm --dir apps/docs run storybook",
@@ -30,7 +30,7 @@
     "registry:check": "node ./scripts/build-registry.mjs --check",
     "registry:install": "node ./scripts/registry-install.mjs",
     "release:publish": "pnpm build && pnpm changeset publish",
-    "release:validate": "pnpm lint && pnpm typecheck && pnpm test && pnpm build && pnpm registry:check && pnpm test:registry:consumer && pnpm test:package:consumer",
+    "release:validate": "pnpm harness:validate:release",
     "release:version": "pnpm changeset version && pnpm install --lockfile-only && pnpm registry:build",
     "test": "pnpm --filter @ai-ui/ui test",
     "test:e2e": "playwright test",