feat: initialize frontend with React and Vite setup

- Add main application structure with App component
- Implement state management for counter functionality
- Create CSS styles for application layout and components
- Include assets for logos and hero image
- Set up Vite configuration for development environment
- Establish global CSS variables for theming

.env.example

@@ -0,0 +1,4 @@
+ORCID_CLIENT_ID=
+ORCID_CLIENT_SECRET=
+DATABASE_URL=postgresql://postgres:postgres@db:5432/orcid_db
+REDIS_URL=redis://redis:6379/0