Address missing pf-react components in the Docs API

Scope
Ensure @patternfly/react-core components that should appear in the Docs API are present and usable (index entry and expected props/examples/docs where applicable). Fix gaps found against the current react-core set—not a blanket expansion to other packages (table, chatbot, etc.).

Approach

1. Diff react-core’s documented/public components against Docs API component-index (and related routes) to list what’s missing or incomplete.
2. For each gap, fix the underlying cause (e.g. content globs / frontmatter in pf-docs.config.mjs, missing or mis-wired Markdown, API index naming, props parse issues in doc-core).
3. Re-build/verify the API until agreed components show up with the right payload shape.
4. Note any intentional exclusions (deprecated/internal/demo-only) in docs or ticket comments.

Jira Issue: PF-4532