v3.1.0 — Step Validation, Reset & Richer Callbacks

🚀 New Features

• reset() — New function from useSteps() to return to the first step. Perfect for "Start Over" flows.
• beforeNext validation guard — Block navigation with sync or async validation. Pass a function to the <Steps> component that returns false to prevent moving forward. next() now returns Promise<boolean> so you can react to blocked navigation.
• onStepChange context — The callback now optionally receives { from, to } with the previous and next step numbers.

🐛 Bug Fixes

• Fixed progress returning NaN when there is only one step
• Fixed TypeScript type definitions for StepsProvider and Steps components

⚙️ Internal

• Migrated test runner from Jest to Vitest
• Fixed broken import paths (./dist → ./lib-ts)
• Added proper Vite entry point (index.html)

📦 Compatibility

All changes are fully backward-compatible. Existing code works without modification.