docs: add a TanStack Query value card to the home page

[justin808]

Adds a Modern data fetching value card to the home page mentioning TanStack Query (client-side caching, mutations, and first-paint data on a Rails JSON API, without a second backend).

Scope note: the examples page already lists the TanStack Starter card (demos.ts), and the Using TanStack Query guide auto-syncs into /docs at build — so the blurb is the only content addition.

Second commit (CI fix): refreshes the generated prompt artifacts (prompts.ts / prompts.json / prompts/llms.txt) from upstream prompts.yml. The prepare:prompts guard was failing on every PR because those committed artifacts lagged react_on_rails main (shakacode/react_on_rails#4232). Verified locally: npm run build (prepare:prompts:check + docusaurus build) passes.

Closes #135

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated app-start guidance to clarify the default setup, licensing requirements across environments, and when to use the standard open-source scaffold.
• New Features
  • Added a new homepage highlight about modern data fetching, showing how Rails JSON APIs can pair with TanStack Query.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 5ab73883-1fca-4d1c-b338-a9f93a0968f6

📥 Commits

Reviewing files that changed from the base of the PR and between 6d2329e and 189d50d.

📒 Files selected for processing (4)

• prototypes/docusaurus/src/constants/prompts.ts
• prototypes/docusaurus/src/pages/index.tsx
• prototypes/docusaurus/static/prompts.json
• prototypes/docusaurus/static/prompts/llms.txt

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Walkthrough

The create-app prompt string is updated across three files (prompts.ts, prompts.json, llms.txt) to add explicit Pro-path, licensing/token, and --standard guidance. A new "Modern data fetching" card is added to the homepage valueCards array.

Changes

Content updates

Layer / File(s)	Summary
create-app prompt update prototypes/docusaurus/src/constants/prompts.ts, prototypes/docusaurus/static/prompts.json, prototypes/docusaurus/static/prompts/llms.txt	Replaces the prior general prompt with explicit Pro-path defaults, per-environment token/license requirements, and --standard usage guidance across all three prompt source files.
Homepage value card prototypes/docusaurus/src/pages/index.tsx	Adds a "Modern data fetching" entry to the valueCards array describing TanStack Query pairing with Rails JSON APIs.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related issues

• #135: This PR directly implements item 2 from the issue (adding a "Modern data fetching" blurb to index.tsx).

Possibly related PRs

• shakacode/reactonrails.com#125: Shares the same prompt data module (prompts.ts, prompts.json, llms.txt) that is modified in this PR.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Out of Scope Changes check	⚠️ Warning	Prompt artifacts were modified even though the linked issue only calls for site marketing/content changes.	Split the prompt regeneration into a separate PR or revert it from this changeset so the PR stays focused on the TanStack Query site updates.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly states the main change: adding a TanStack Query card to the home page.
Linked Issues check	✅ Passed	The home-page TanStack Query blurb was added, and the PR context says the starter card already exists, satisfying the linked site-surface goals.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch jg/docs-tanstack-query-blurb

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[greptile-apps]

Greptile Summary

This PR adds a new home-page value card for TanStack Query. The main change is:

• A “Modern data fetching” card in the Docusaurus home page value-card list.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
prototypes/docusaurus/src/pages/index.tsx	Adds one static TanStack Query value card to the home page card data.

_{Reviews (1): Last reviewed commit: "docs: add a TanStack Query value card to..." | Re-trigger Greptile}

[github-actions]

Cloudflare preview deployed.

• Branch: pr-136
• URL: https://c27466d4.reactonrails-com.pages.dev