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

pnpm-workspace.yaml

@@ -0,0 +1,12 @@
+packages:
+  - packages/*
+
+ignoredBuiltDependencies:
+  - core-js
+
+onlyBuiltDependencies:
+  - '@prisma/client'
+  - '@prisma/engines'
+  - bcrypt
+  - esbuild
+  - prisma