When I tried calling flake8_trio directly from the commandline, it turns out that doesn't respect # noqa comments - which would unfortunately block direct use for now. If supporting them is viable, let's do that and add a --disable-noqa flag for the current behavior.

I'd also prefer to name the cli tool flake8-trio; underscores are pretty unusual in the terminal.

Once this is in, I think we're ready to release the big refactoring!