docs: replace deprecated create-tsrouter-app and create-start-app with @tanstack/cli create

[2nofa11]

The create-tsrouter-app and create-start-app CLI tools are deprecated.
This PR replaces all references with the recommended npx @tanstack/cli create.

Also removed obsolete flags:

• --template (not supported in @tanstack/cli create)
• --tailwind (always enabled since TanStack/cli@337eeba)

Docs-only change. No code behavior changes.

Summary by CodeRabbit

Release Notes

• Documentation
  • Updated installation and setup instructions across TanStack Router and Start frameworks to use the new unified TanStack CLI command
  • Updated all Quick Start guides and tutorials with the new CLI invocation for both React and Solid projects
  • Refreshed meta descriptions and example project documentation to reflect the updated CLI tooling

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR updates CLI command references throughout documentation and example files, replacing deprecated create-tsrouter-app and create-start-app commands with the standardized @tanstack/cli create package across React, Solid, and Start frameworks.

Changes

Cohort / File(s)	Summary
React Router Documentation docs/router/framework/react/quick-start.md, docs/router/framework/react/how-to/setup-ssr.md, docs/router/framework/react/how-to/integrate-shadcn-ui.md	Replaced deprecated create-tsrouter-app@latest CLI commands with @tanstack/cli create across multiple examples and updated documentation link references accordingly.
Solid Router Documentation docs/router/framework/solid/quick-start.md	Updated CLI commands from create-tsrouter-app@latest to @tanstack/cli create for Solid framework scaffolding examples.
Start Documentation docs/start/framework/react/tutorial/fetching-external-api.md	Updated project initialization command from pnpx create-start-app to pnpx @tanstack/cli create.
Example Meta Descriptions examples/react/i18n-paraglide/index.html, examples/solid/i18n-paraglide/index.html	Updated meta description tags from "Web site created using create-tsrouter-app" to "Web site created using TanStack CLI".
Example Installation Guides examples/react/start-bun/README.md, examples/solid/start-bun/README.md	Updated installation instructions from bunx create-start-app@latest to bunx @tanstack/cli create.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• docs(solid-router): i18n paraglide example #5844: Adds the solid i18n-paraglide example that includes the index.html file being updated in this PR.
• docs: Update Some Router Docs #5443: Modifies the same React Router quick-start documentation to shift toward the TanStack CLI for scaffolding.
• Tutorial: Fetching data from an external API #5050: Adds the Start framework tutorial that is having its scaffold command updated here.

Suggested labels

documentation

Suggested reviewers

• birkskyum
• brenelz
• schiller-manuel

Poem

🐰 A rabbit hops through docs with glee,
Old commands fade, new CLI,
With @tanstack standing tall and proud,
The tools evolve, announced aloud! 🚀

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and specifically describes the main change: replacing deprecated CLI commands with @tanstack/cli create across documentation files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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