feat(02-02): implement ESP32Transport UDP client with asyncio DatagramProtocol

- ESP32Transport.send_command() injects v:1, fire-and-forget, silent drop if not ready
- 512-byte payload limit enforced with warning log
- datagram_received() parses STATUS ok → connected=True, stores last_status
- on_status callback support for status update notifications
- connection_lost() sets connected=False, clears transport ref
- create_esp32_transport() async factory sends initial STATUS ping (D-12)
- All protocol behaviors match docs/protocol.md exactly (D-10, D-11, D-12, D-14)
- Add pytest-asyncio to dev deps + asyncio_mode=auto for test suite

pyproject.toml

@@ -0,0 +1,28 @@
+[project]
+name = "led-sync-studio"
+version = "0.1.0"
+description = "Cyberpunk LED choreography app for Raspberry Pi + ESP32"
+requires-python = ">=3.11"
+dependencies = [
+    "miniaudio==1.61",
+    "numpy>=2.4.4",
+    "pydantic==2.12.5",
+    "sounddevice==0.5.5",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/led_sync"]
+
+[dependency-groups]
+dev = [
+    "pytest>=8.0",
+    "pytest-asyncio>=0.23",
+]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]