add chatbot extension to doc api and propsGlob config

[patternfly-jira-sync]

Scope
Ensure @patternfly/chatbot is fully represented in the Docs API and included in props extraction via propsGlobs, so chatbot components can appear in props.json / component schemas—not only as Markdown examples.

Approach

1. Confirm current state in pf-docs.config.mjs: chatbot is already under content (chatbot-docs); it is not in propsGlobs.
2. Verify Docs API index/routes expose chatbot pages as expected; fix content/frontmatter/API gaps if any are missing.
3. Add a propsGlobs entry for @patternfly/chatbot (same exclude patterns as react-core: examples, tests, mocks).
4. Rebuild props → regenerate/publish schemas (or hand off to the schemas regen ticket) and spot-check chatbot component props in the API / schemas package.

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Jira Issue: PF-4534

[coderabbitai]

🔗 Related PRs

#198 - feat(api): add api endpoint for component props [merged]
#221 - feat(API): [PF-3167] Add component-index.json API endpoint for MCP [merged]

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