Mark packages as deprecated and lint/hint against their usage

### Your question:

I'm preparing some X-to-conda-forge mappings to support an upcoming PEP and I've noticed a few dependencies that have many "implementations" available in our ecosystem. Mostly the case with CDTs.

Most of them have been replaced with from-source builds. I'm wondering if we should:

1. Maintain a list of "deprecated" package names and their substitutions (e.g. `freetype-cos7-x86_64` -> `freetype`).
2. Lint or hint recipes where the deprecated names are detected and suggest their recommended counterparts.