Write an "incremental linting" tutorial

[cczona]

A quickstart introduction to using a backend. Focusing on the quickest, simplest path to exploiting the capabilties of a linter. Showcasing the linter (for instance, Ruff?), with Pants as the enhancer.

[cczona]

@thejcannon @AlexTereshenkov can I interest one of you in writing this...? ❤️

[cczona]

("Incremental" in this context refers to incremental adoption of Pants)

[thejcannon]

I'd honestly like us to support "hybrid" plugins then this guide would be very short because our "incremental" support looks like "just enable the backend"

It's still on my TODO list.