Registry wiki: document linters used in expected styleguides.

[timburks]

registry compute conformance requires local installation of any linters used in the style guide. We should document that for our commonly-used linters.

[theganyo]

I added a note on installation at the top of this page: https://github.com/apigee/registry/wiki/registry-compute. Is this sufficient?

Related: I noticed that two commands claim "soon to be deprecated" in this doc...

registry compute lint
Soon to be deprecated, please check compute conformance command.
Compute lint results for API specs

registry compute lintstats
Soon to be deprecated, please check compute score command.
Compute summaries of linter runs

However, these have not been deprecated and searching in our issues, I found there is a question of whether they even should be: #1121. We should decide to deprecate or not... as is, this will cause confusion.

[timburks]

I don't think these should be deprecated, at least not compute lint... the reason being that the styleguide infrastructure is powerful-but-complicated and I think it's useful to have a direct way to run linters to verify that the linter setup is correct.

[theganyo]

Ok, thanks. I'm closing this as completed.