feat: Drama Studio 프로젝트 초기 구조 설정

- FastAPI 백엔드 (audio-studio-api)
- Next.js 프론트엔드 (audio-studio-ui)
- Qwen3-TTS 엔진 (audio-studio-tts)
- MusicGen 서비스 (audio-studio-musicgen)
- Docker Compose 개발/운영 환경

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

.gitignore

@@ -0,0 +1,40 @@
+# Environment
+.env
+.env.*
+!.env.example
+
+# Dependencies
+node_modules/
+__pycache__/
+*.pyc
+.venv/
+venv/
+
+# Build outputs
+.next/
+dist/
+build/
+*.egg-info/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+logs/
+
+# Docker volumes
+data/
+
+# Models (large files)
+models/
+*.pt
+*.bin
+*.safetensors