add IA structure to SDK repo

[kate-dunn]

Adding more IA structure to SDK docs

Key Changes:

• adding sections to the SDK docs for easier finding

Changed:

• Updated SDK docs to now have three new subsections

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Generated Summary:

• Updated the documentation structure for the SDK in docs/docs.json.
• Introduced three new groups:
  • Core
  • Data and Processing
  • Evaluation and Integrations
• Each group contains relevant pages that were previously listed individually.
• Enhances organization and accessibility of SDK documentation.
• Potentially improves onboarding and navigation for developers using the SDK.

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