Support asyncio

@hexoul đang làm issue này rồi.

Từ ngày 2/9/2022.

Central Dogma provides a watch API with a long connection. It would be inefficient to use a thread for watching files.
I think we can use Event loop and Coroutines with [asyncio](https://docs.python.org/3/library/asyncio.html) for better performance and fewer resources.