ruff

e2d879ab - [ty] Move some module name helper routines to methods on `ModuleName`

[ty] Move some module name helper routines to methods on `ModuleName` These were previously only used in auto-import, but we'll want to use them for filtering subtypes too. So put them in a more central location. I think these codify pretty solid ecosystem conventions, but I've added some cautionary language to the docs for these methods.