feat: setup project infrastructure

- Create folder structure (server, client, install)
- Add server package.json with LiveKit SDK, Express, Opus
- Add client package.json with React, Vite, livekit-client
- Add macOS installation script with LiveKit binary download
- Add basic YAML config (1 group, 2 channels, audio quality settings)
- Add .gitignore for dependencies and binaries

.gitignore

@@ -0,0 +1,45 @@
+# Dependencies
+node_modules/
+package-lock.json
+yarn.lock
+pnpm-lock.yaml
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Build outputs
+dist/
+build/
+*.log
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Binaries
+server/bin/livekit-server
+*.tar.gz
+
+# Test coverage
+coverage/
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+
+# Debug logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*