docs(samples-cc-react-app): add AI documentation - AGENTS.md

[Shreyas281299]

COMPLETES N/A - Documentation Enhancement

This pull request addresses

Adding AI-optimized documentation for the samples-cc-react-app to help AI assistants understand the React sample application usage.

by making the following changes

• Added widgets-samples/cc/samples-cc-react-app/ai-docs/AGENTS.md - Usage documentation and setup guide

Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Tooling change
• Internal code refactor

The following scenarios were tested

• The testing is done with the amplify link

The GAI Coding Policy And Copyright Annotation Best Practices

• GAI was not used (or, no additional notation is required)
• Code was generated entirely by GAI
• GAI was used to create a draft that was subsequently customized or modified
• Coder created a draft manually that was non-substantively modified by GAI (e.g., refactoring was performed by GAI on manually written code)
• Tool used for AI assistance (GitHub Copilot / Other - specify)
  • Github Copilot
  • Other - Please Specify: Cursor AI
• This PR is related to
  • Feature
  • Defect fix
  • Tech Debt
  • Automation

Checklist before merging

• I have not skipped any automated checks
• All existing and new tests passed
• I have updated the testing document
• I have tested the functionality with amplify link

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Make sure to have followed the contributing guidelines before submitting.

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[eigengravy]

The checkboxes in the sample app currently have aria-label for accessibility, could add that as well.

[Shreyas281299]

Updated