v0.2.0

Added

• Redux Toolkit store with the counter feature as the model for new state features.
• ESLint (npm run lint) and Vitest (npm test).
• CHANGELOG.md and generated per-version release notes in release_notes/, shown on the in-app Release Notes page.

Changed

• Replaced Create React App with Vite.
  The dev server still runs on port 3004, and production builds now go to dist/.

Removed

• react-scripts, web-vitals and the Jest-only test dependencies.