Refactor: Add asyncio support

[glensc]

Get started with asyncio:

• https://docs.python.org/3/library/asyncio.html

Add @coro decorator to get started:

• Asyncio integration pallets/click#85 (comment)

Major blocker is missing async for rich:

• Support tracking progress of async tasks  Textualize/rich#2480

May be fixed with:

• Feature: Add async iterator support to RichProgressBar #1698

General async reading list:

• https://github.com/python-trio/trio/wiki/Reading-list

[glensc]

Some rich related threads:

• rich+asyncio Textualize/rich#1401
• How to use rich.Progress with asyncio Textualize/rich#1137

[glensc]

This actually worked for me, and processed libraries in parallel! :) and thus was running as long as shows sync runs as movies sync finished by the time shows sync was running.

[glensc]

General async reading list:

• https://github.com/python-trio/trio/wiki/Reading-list

[glensc]

now need async pluggy as well:

• Refactor: Use pluggy framework to extract Sync to plugins #1892

considerations:

• https://aiopluggy.readthedocs.io/en/latest/ repo archived
• https://github.com/simonsobs/apluggy doesn't reinvent, but rather wraps, so seems good