Add autorag recipes page

[G4brym]

Summary

Adds autorag recipes page

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

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PR Change Summary

Added a new autorag recipes page to provide practical examples for common use cases and updated existing documentation for clarity.

• Introduced a new recipes page for AutoRAG with practical examples.
• Updated indexing documentation to include a link to size limits.
• Provided code examples for using AutoRAG with custom models and simple search engines.

Modified Files

• src/content/docs/autorag/configuration/indexing.mdx

Added Files

• src/content/docs/autorag/usage/recipes.mdx

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[aninibread]

approved! inline comments optional but would be nice to have