feat: Bilibili Live Danmaku -> Yukkuri TTS Reader

- Python main entry with CLI (--room-id, --voice, --speed)
- blivedm integration for real-time danmaku receiving
- Chinese-to-Japanese katakana conversion (pypinyin + mapping table)
- Node.js persistent bridge for aquestalk.js TTS synthesis
- Audio playback via sounddevice
- Message queue for sequential TTS playback

.gitignore

@@ -0,0 +1,31 @@
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+*.egg-info/
+dist/
+build/
+*.egg
+
+# Virtual environments
+venv/
+.venv/
+env/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Temp files
+tmp/
+temp/
+*.tmp
+
+# Node.js
+node_modules/