feat: implement counter management application with drag-and-drop functionality

- Add main application component (App.tsx) to manage counters
- Create Counter component for individual counter display and editing
- Implement CreateCounter component for adding new counters
- Add API utility for handling server requests
- Set up Vite configuration with proxy for API calls
- Introduce TypeScript configuration for app and node environments
- Style application with global CSS for consistent design

.gitignore

@@ -0,0 +1,36 @@
+# Node modules (global catch-all)
+**/node_modules/
+
+# Frontend build outputs
+/frontend/dist/
+/frontend/build/
+/frontend/.vite/
+
+# Backend runtime data (DB + uploads)
+backend/data/
+backend/data/**
+
+# Keep prisma migrations tracked (commit these)
+!/backend/prisma/migrations/
+!/backend/prisma/migrations/**
+
+# Database files
+*.sqlite
+*.db
+
+# Environment (do NOT commit secrets)
+.env
+.env.local
+.env.*.local
+
+# Logs
+npm-debug.log*
+yarn-debug.log*
+pnpm-debug.log*
+*.log
+
+# Editor / OS
+.vscode/
+.idea/
+.DS_Store
+Thumbs.db