chore: add changeset for PowerSync add-on

[tannerlinsley]

Summary

• Adds the missing changeset for #407 (React PowerSync scaffolding add-on, merged as 8f24af5) so the next Version Packages release publishes it.
• Minor bump for @tanstack/cli and @tanstack/create.

Verification

Locally scaffolded a fresh app with the add-on and confirmed the integration is wired up end-to-end:

node packages/cli/dist/index.js create powersync-test --framework react --add-ons powersync --no-git --no-intent -y
cd powersync-test
npx tsc --noEmit            # clean
npm run build               # client + SSR succeed
npm run dev -- --port 4567  # SSR serves /demo/powersync → HTTP 200

The Vite plugin excludes @powersync/web from optimizeDeps (required for the WA-SQLite VFS), the PowerSyncProvider opens the DB with disableSSRWarning, the sample AppSchema/BackendConnector read VITE_POWERSYNC_URL/VITE_POWERSYNC_TOKEN from .env.local, and /demo/powersync inserts local rows + renders live useQuery results without any real PowerSync instance configured.

Test plan

• pnpm build
• pnpm test (pre-commit hook)
• Scaffolded React + PowerSync app builds and SSR-renders /demo/powersync

Summary by CodeRabbit

New Features

• Added PowerSync add-on scaffolding via tanstack add powersync command or --add-ons powersync flag for TanStack Create
• Automatically integrates PowerSync Web SDK into React applications with sample demo route and live query support

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: b79b8eab-5607-4bb7-9403-079a9d8f9e89

📥 Commits

Reviewing files that changed from the base of the PR and between fbcbf6e and dd955cf.

📒 Files selected for processing (1)

• .changeset/powersync-addon.md

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📝 Walkthrough

Walkthrough

This PR introduces a Changeset entry that documents a new PowerSync add-on scaffold for TanStack Create. The entry marks a minor version bump for both @tanstack/cli and @tanstack/create and describes the scaffolded integration including Vite configuration, a PowerSyncProvider component, example schema and connector code, and a demo route.

Changes

PowerSync Add-on Release Notes

Layer / File(s)	Summary
Release Metadata .changeset/powersync-addon.md	Changeset header declares minor version bumps for @tanstack/cli and @tanstack/create.
Feature Description .changeset/powersync-addon.md	Feature entry documents tanstack add powersync scaffold: Vite plugin for PowerSync Web SDK and WA-SQLite worker emissions, PowerSyncProvider with SSR warning suppression, sample AppSchema and BackendConnector with environment variable reading, and /demo/powersync route demonstrating local inserts and live query results.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

A PowerSync bloom takes root so true,
With WA-SQLite workers breaking through,
Demo queries dance on the Start runtime,
Hop-hop, the scaffold's yours to climb! 🐰✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the primary change: adding a changeset file for the PowerSync add-on feature that was previously merged but lacked a changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch taren/festive-pike-a87b52

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