chore: 初始化 monorepo 项目脚手架

- 配置 pnpm workspace + Turborepo
- 创建 Next.js 15 前端应用 (apps/web)
- 创建 NestJS 10 后端应用 (apps/api)
- 集成 Prisma ORM + Swagger + JWT 认证
- 添加共享包 (packages/shared, eslint-config, typescript-config)
- 添加项目文档 (README, CLAUDE.md, docs/design.md)

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,40 @@
+# Dependencies
+node_modules
+.pnpm-store
+
+# Build outputs
+dist
+.next
+.turbo
+out
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# IDE
+.idea
+.vscode
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+
+# Testing
+coverage
+.nyc_output
+
+# Prisma
+prisma/*.db
+prisma/*.db-journal
+
+# Misc
+*.tsbuildinfo