Enhance documentation for textOutput() and gridOutput() methods

[hxrshxz]

Resolves

• Accessibility Features Proposal - Expand Web Accessibility module #6992

Changes:

Updated JSDoc documentation for textOutput() and gridOutput() in src/accessibility/outputs.js to clearly document known limitations.

PR Checklist

• npm run lint passes
• Inline reference is included / updated
• Unit tests are included / updated

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Pull Request Overview

This PR enhances the JSDoc documentation for the textOutput() and gridOutput() accessibility methods by adding comprehensive information about their known limitations and recommending alternative approaches.

• Added detailed documentation of limitations for both methods (English-only descriptions, WEBGL incompatibility, shape detection issues)
• Recommended describe() and describeElement() as more accurate alternatives
• Improved developer awareness of when these methods may not work as expected

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