Initial commit: booking-ewa v1.0.0

Embedded Web App for EV charging slot bookings. Express backend with JWT
auth and AMPECO Public API proxy. React SPA with booking CRUD, availability
checking, and runtime design token theming.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,5 @@
+API_BASE_URL=https://your-instance.charge.ampeco.tech/public-api
+API_TOKEN=your-api-token-here
+JWT_SECRET=your-jwt-secret-here
+PORT=3001
+NODE_ENV=development