fix: add catalog settings to yarnrc schema

[cyphercodes]

What's the problem this PR addresses?

Resolves #7178.

The published .yarnrc.yml JSON schema doesn't include the catalog and catalogs settings from @yarnpkg/plugin-catalog, so editors cannot validate or autocomplete them.

How did you fix it?

Added catalog and catalogs entries to packages/docusaurus/static/configuration/yarnrc.json, matching the map shapes defined by the catalog plugin.

Checklist

• I have read the Contributing Guide.
• I have set the packages that need to be released for my changes to be effective. (Not applicable: static schema/documentation metadata only.)
• I will check that all automated PR checks pass before the PR gets reviewed.

Validation:

• python3 JSON parse + assertions for catalog / catalogs schema shapes
• git diff --check