Adds json previews

[andrewxhill]

JSON Preview Enhancement

This PR improves the JSON file preview functionality in the Object component, making it more robust and user-friendly.

Changes

• Enhanced JSON content detection and rendering
• Added proper whitespace preservation for JSON formatting
• Improved MIME type detection for JSON files
• Added comprehensive JSDoc documentation for component and key functions

Technical Details

• JSON files are now properly detected through both content-type headers and file extensions
• Added validation of JSON content before rendering
• Implemented pretty-printing with proper indentation (2 spaces)
• Preserved whitespace formatting specifically for JSON content
• Maintained size-based content truncation with full content toggle

Testing

The changes can be tested by:

1. Viewing any JSON file in a bucket
2. Verifying that the content is properly formatted with indentation
3. Testing large JSON files to ensure truncation and "Show Full Content" work correctly
4. Checking that malformed JSON files fallback gracefully to plain text display

Screenshots

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Name	Status	Preview	Comments	Updated (UTC)
faucet	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 24, 2025 4:04pm
portal	❌ Failed (Inspect)			Mar 24, 2025 4:04pm