docs(readme): fix grammar typo - Tracer end-to-end test drill

[urjitc]

This is a Tracer end-to-end test drill, not a response to a real incident.

Summary

As part of the Tracer investigation pipeline self-test, I inspected the repository, identified a small, genuinely correct documentation improvement, and verified it with the available checks.

Repository snapshot

• Project: ThinkEx-OSS/thinkex — a full-stack TypeScript workspace for source-heavy study/research, running on Cloudflare Workers.
• Frontend: React 19, TanStack Start/Router/Query, Tailwind CSS v4, Tiptap 3, Yjs.
• Backend: Cloudflare Workers, Durable Objects, D1 (Drizzle), R2, Workflows, Containers, Workers AI, Browser Rendering, Email.
• Tooling: Vite+ (vp), pnpm 11.7.0, Node 24, Vitest, Wrangler.
• Recent history: 1195eae was already a docs-only fix to CONTRIBUTING.md; the working tree was clean before this change.

Change made

Fixed a grammar typo in README.md:

- If you want to run or contribute the ThinkEx web app, start with:
+ If you want to run or contribute to the ThinkEx web app, start with:

This is a safe documentation-only change; no behavior is affected.

Verification

Ran the project's format/type/lint verification:

pnpm check

Result:

• Lockfile passes supply-chain policies.
• All 574 files are correctly formatted.
• Found no warnings, lint errors, or type errors in 552 files.

No incident

No production telemetry was evaluated and no user impact is claimed. This PR only exercises the draft-PR flow of the Tracer investigation pipeline.

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Summary by CodeRabbit

• Documentation
  • Added introductory guidance to the Contributing section, helping contributors find setup and contribution information.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 0106cab9-3053-4f83-b51b-7e2350070b8e

📥 Commits

Reviewing files that changed from the base of the PR and between 1195eae and d103c50.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

The README’s ## Contributing section now includes an introductory sentence before the existing links to CONTRIBUTING.md and docs/ENVIRONMENT.md.

Changes

Contributing Guide

Layer / File(s)	Summary
Contributing section introduction README.md	Adds a sentence directing contributors to begin with the existing contribution and environment documentation links.

Estimated code review effort: 1 (Trivial) | ~2 minutes

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch tracer/thinkex-production--simulation--1783824993614

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[greptile-apps]

Greptile Summary

This PR fixes a small grammar issue in the README. The main change is:

• Updates the contributing sentence to say “contribute to the ThinkEx web app”.

Confidence Score: 5/5

This looks safe to merge.

No blocking issues found in the changed code.

No files need attention.

T-Rex Logs

What T-Rex did

• Captured the full pnpm check output and exit code in trex-artifacts/pnpm-check.log.
• Captured the README sentence describing ThinkEx in trex-artifacts/readme-sentence.txt.

_{Ran code and verified through T-Rex}

Important Files Changed

Filename	Overview
README.md	Grammar-only wording fix in the contributing section.

_{Reviews (1): Last reviewed commit: "fix: docs(readme): fix grammar typo - Tr..." | Re-trigger Greptile}