docs(extraction): move Starter kits to examples/README.md (#2266 follow-up)

[kheiss-uwzoo]

Summary

Follow-up to #2266 per @randerzander review: delete the duplicate extraction/starter-kits.md doc page, move its content to examples/README.md, and link the TOC and legacy redirects directly to that GitHub README.

• Add examples/README.md with starter-kit notebook links (docs cross-links use published docs.nvidia.com URLs; in-repo notebooks use relative paths).
• Remove docs/docs/extraction/starter-kits.md.
• Update docs/mkdocs.yml nav (Starter kits) and redirects (notebooks, starter-kits, integrations-langchain-llamaindex-haystack) to the GitHub examples README.
• Update extraction cross-links in overview, concepts, deployment-options, getting-started-about, workflow-e2e-blueprints, and agentic-retrieval-concept.

Test plan

• mkdocs build -f docs/mkdocs.yml --strict — redirects for legacy paths resolve to GitHub README
• Sidebar Starter kits opens GitHub examples/README.md
• /extraction/starter-kits/ and /extraction/notebooks/ redirect to GitHub README after republish
• Overview and related cross-links resolve to GitHub README

Related

• fix(docs): repair Starter kits redirect loop breaking docs.nvidia.com links after PR 2195 #2266 — repair Starter kits redirect loop (merged)
• PR remove custom-metadata.md; canonical path is vdbs + notebooks #2195 — doc path consolidation

[greptile-apps]

Greptile Summary

This PR consolidates the Starter Kits documentation by deleting docs/docs/extraction/starter-kits.md and replacing all its inbound links with direct references to the new examples/README.md on GitHub, following up on reviewer feedback from #2266.

• Removed extraction/starter-kits.md; content migrated to examples/README.md with published docs.nvidia.com URLs for cross-links and relative paths for in-repo notebooks (all of which exist in examples/).
• Updated docs/mkdocs.yml: nav entry for "Starter kits" now points to the external GitHub URL, and redirect_maps covers the old extraction/starter-kits.md, extraction/notebooks.md, extraction/notebooks/index.md, and extraction/integrations-langchain-llamaindex-haystack.md paths — all valid usage of the mkdocs-redirects plugin.
• Updated six extraction doc pages to link directly to the GitHub README instead of the now-deleted local page.

Confidence Score: 5/5

Documentation-only change with no logic, no code, and no API surface — safe to merge.

All nine changed files are Markdown or YAML documentation. The mkdocs-redirects plugin supports external URLs as redirect targets, the nav external URL is valid MkDocs syntax, and every relative notebook path in examples/README.md resolves to a file that exists in the repository.

No files require special attention.

Important Files Changed

Filename	Overview
examples/README.md	New starter-kits README added with correct relative links to all notebooks that exist in examples/; docs.nvidia.com URLs used for cross-links to published docs.
docs/mkdocs.yml	Nav entry updated to external GitHub URL (valid MkDocs syntax); redirect_maps correctly adds extraction/starter-kits.md and updates notebooks/integrations entries to external GitHub URL, supported by mkdocs-redirects.
docs/docs/extraction/starter-kits.md	File deleted; content moved to examples/README.md; a redirect entry in mkdocs.yml covers the old URL.
docs/docs/extraction/deployment-options.md	Starter-kit notebook link updated; audio/video Kubernetes paragraph replaced with a short reference to audio-video.md — deliberate consolidation.
docs/docs/extraction/overview.md	Two links updated from starter-kits.md to GitHub examples/README.md URL.
docs/docs/extraction/concepts.md	Single notebook link updated from starter-kits.md to GitHub examples/README.md URL.
docs/docs/extraction/agentic-retrieval-concept.md	Single starter-kits link updated to GitHub examples/README.md URL.
docs/docs/extraction/getting-started-about.md	Single notebook link updated from starter-kits.md to GitHub examples/README.md URL.
docs/docs/extraction/workflow-e2e-blueprints.md	Single starter-kits link updated to GitHub examples/README.md URL.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["docs site visitor\n(old URL)"] -->|"extraction/starter-kits.md\nnotebooks.md etc."| B["mkdocs-redirects\n(redirect_maps)"]
    B -->|"HTTP redirect"| C["github.com/.../examples/README.md"]
    D["docs site nav\n'Starter kits'"] -->|"external link"| C
    E["docs cross-links"] -->|"absolute GitHub URL"| C
    C -->|"relative links"| F["examples/*.ipynb"]
    C -->|"docs.nvidia.com URLs"| G["Published docs site"]

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%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    A["docs site visitor\n(old URL)"] -->|"extraction/starter-kits.md\nnotebooks.md etc."| B["mkdocs-redirects\n(redirect_maps)"]
    B -->|"HTTP redirect"| C["github.com/.../examples/README.md"]
    D["docs site nav\n'Starter kits'"] -->|"external link"| C
    E["docs cross-links"] -->|"absolute GitHub URL"| C
    C -->|"relative links"| F["examples/*.ipynb"]
    C -->|"docs.nvidia.com URLs"| G["Published docs site"]

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