Update index.mdx Rename API -> SDK

[SwapnilChand]

Update Home Page Content and Navigation

• Purpose:
  Revise the homepage content and navigation to better highlight the Kaizen SDK and its key features.
• Key Changes:
  • Renamed "API Reference" section to "SDK Reference" to align with the product branding.
  • Updated the SDK Reference link to point to the "code_review" page within the SDK reference documentation.
  • Adjusted the section descriptions to focus on the Kaizen SDK and its capabilities.
• Impact:
  These changes will help users quickly navigate to the SDK documentation and understand the core functionality of the Kaizen product.

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Original Description

None

[kaizen-bot]

🔍 Code Review Summary

✅ All Clear: This commit looks good! 👍

Overview

• Total Feedbacks: 0 (Critical: 0, Refinements: 0)
• Files Affected: 0
• Code Quality: [█████████████████░░░] 85% (Good)

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