feat(app-builder): add nested E2E harness

[kattsushi]

Summary

• add an isolated, OS-temp nested workspace E2E harness for generated app-builder output
• validate local packed Effect distribution installation through an isolated registry, pnpm store, and Nx state
• prove nested graph/test/typecheck/build, Todo Live CRUD/events, zero-diff regeneration, cleanup, and root exclusion

Validation

• pnpm nx test @effectify/app-builder-e2e
• pnpm nx lint @effectify/app-builder-e2e
• pnpm nx typecheck @effectify/app-builder-e2e
• pnpm nx build @effectify/app-builder-e2e
• pnpm nx run @effectify/repo:format:check
• exact-parent affected lint, typecheck, test, and build checks against b7348d7eae289a6990c9d3142f293bad4217dafe

Closes #125

Part of #92. Child of #124; this draft targets feat/app-builder-golden-replay.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 7ed68537-bdc8-41d5-a424-7d88a080308f

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}