Event loop

Pure Python tiny async runtime 🙂

To do:

• Don't have spawn be an async function.
• Handle main return value.
• Refactor printing into proper logging.

Sources:

• https://github.com/AndreLouisCaron/a-tale-of-event-loops?tab=readme-ov-file
• https://gist.github.com/tarruda/5b8c19779c8ff4e8100f0b37eb5981ea