feat: Set up Task Master AI project management system

- Initialize Task Master AI with configuration and PRD
- Create comprehensive project improvement plan (10 tasks)
- Set up MCP server integration for Claude Code
- Add custom slash commands and tool configurations
- Generate structured task breakdown for development phases:
  * Phase 1: TypeScript strict mode, code quality, security
  * Phase 2: Zustand, TanStack Query, testing setup
  * Phase 3: Performance optimization, automated deployment
  * Phase 4: Monitoring, bundle optimization

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

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

.claude/commands/taskmaster-next.md

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+다음 Task Master 태스크를 찾아서 상세 정보를 보여줍니다.
+
+단계:
+
+1. `task-master next` 실행해서 다음 태스크 확인
+2. 태스크가 있다면 `task-master show <id>` 실행해서 상세 정보 표시
+3. 구현해야 할 내용 요약 제공
+4. 첫 번째 구현 단계 제안