Report Nogo errors on only changed files.

Hi,

Recently i was trying to get Nogo integrated with our existing Repo. One major integration hurdle I faced was,
When running nogo enabled, the bazel build fails on existing linter issues, even on files that the developer has not touched.

Given we have a large repo and with many services, we wanted to throw lint errors only on changed files.
I made some hacky patch to lint and report issues on only files the author has touched to overcome this.
So wanted to understand if there's anything on the roadmap to lint only the changes?

Start by reviewing how Nogo is integrated into the Bazel build and how lint errors are currently reported for existing repositories. Done means establishing a supported way to report lint errors only for files changed by the developer.

Written by the indexing model from the issue text.