feat: initial schemas-app implementation

- Add Nuxt 4 application with Vuetify UI framework
- Implement GraphQL schema registry management interface
- Add Apollo Client integration with Auth0 authentication
- Create organization and API key management
- Add schema and ref browsing capabilities
- Implement organization switcher for multi-org users
- Add delete functionality for organizations and API keys
- Create Kubernetes deployment descriptors
- Add Docker configuration with nginx

Features:
- Dashboard with organization overview
- Schema browsing by ref with supergraph viewing
- Ref management with schema details
- Settings page for organizations and API keys
- User list per organization with provider icons
- Admin-only organization creation
- Delete confirmations with warnings

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.env.example

@@ -0,0 +1,7 @@
+# GraphQL Schema Registry API URL (optional - auto-detected based on hostname)
+# NUXT_PUBLIC_API_BASE=http://localhost:8080
+
+# Auth0 Configuration
+NUXT_PUBLIC_AUTH0_DOMAIN=unbound.eu.auth0.com
+NUXT_PUBLIC_AUTH0_CLIENT_ID=7k3rZ4HRxRTkTCI3ytpF8ji0o531Zq3M
+NUXT_PUBLIC_AUTH0_AUDIENCE=https://schemas.unbound.se