[Bug?]: yarn install warns about peer dependencies that yarn explain peer-requirements can't explain

[seansfkelley]

Self-service

• I'd be willing to implement a fix

Describe the bug

Some packages cause Yarn to trigger peer dependency warnings, but when you try to use the recommended yarn explain peer-requirements with the 6-letter code, it responds:

The yarn explain peer-requirements command doesn't support this warning type yet.

To reproduce

Starting from an empty directory:

# gets version 4.0.2 right now
yarn init -2 --yes

# complains about missing @babel/core, gives code p8740a
yarn add @babel/plugin-syntax-flow@7.23.3

# responds that it doesn't recognize the code
yarn explain peer-requirements p8740a

Environment

System:
    OS: macOS 13.6
    CPU: (12) arm64 Apple M2 Pro
  Binaries:
    Node: 18.18.2 - /private/var/folders/wg/zn78dyk51h5bvz0crq8x8w0h0000gp/T/xfs-47828ecd/node
    Yarn: 4.0.2 - /private/var/folders/wg/zn78dyk51h5bvz0crq8x8w0h0000gp/T/xfs-47828ecd/yarn
    npm: 9.8.1 - ~/.volta/tools/image/node/18.18.2/bin/npm

Additional context

No response