Initial project setup: monorepo structure with frontend and backend

- Set up pnpm workspace with frontend (React + Vite) and backend (Express + Prisma)
- Configure TypeScript, ESLint, and Prettier
- Add Prisma schema for database models (User, Course, Lesson, Progress, etc.)
- Create basic frontend structure with Tailwind CSS and shadcn/ui
- Add environment configuration files
- Update README with project overview and setup instructions
- Complete Phase 0: Project initialization

.gitignore

@@ -0,0 +1,49 @@
+# Dependencies
+node_modules/
+.pnpm-store/
+
+# Build outputs
+dist/
+build/
+*.tsbuildinfo
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+pnpm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Testing
+coverage/
+.nyc_output/
+
+# Uploads (local development)
+packages/backend/uploads/
+
+# Prisma
+packages/backend/prisma/migrations/
+!packages/backend/prisma/migrations/.gitkeep
+
+# Temporary files
+*.tmp
+.cache/
+.temp/
+