Implement Mock JavaScript Tool Bundle

[IanMayo]

Summary

Implements a complete JavaScript-based tool bundle for ToolVault UI development and testing, as specified in Issue #1.

What's Included

• ✅ Complete /examples/javascript-bundle/ directory structure
• ✅ All 11 GeoJSON processing tools implemented with IIFE pattern
• ✅ Jest test suite with 19 passing tests
• ✅ index.json with runtime field and complete metadata
• ✅ Sample GPS track data for testing
• ✅ Tools organized by category (transform, analysis, statistics, processing, io)

Tools Implemented

Transform Tools

• Translate Features - Move GeoJSON features by direction and distance
• Flip Horizontal - Mirror features horizontally
• Flip Vertical - Mirror features vertically

Analysis Tools

• Calculate Speed Series - Generate time series of speeds from GPS tracks
• Calculate Direction Series - Generate time series of travel directions

Statistics Tools

• Average Speed - Calculate average speed from GPS track
• Speed Histogram - Create histogram of speeds with configurable intervals

Processing Tools

• Smooth Polyline - Apply smoothing algorithms to LineStrings

I/O Tools

• Import REP - Parse REP format to GeoJSON
• Export to REP - Convert GeoJSON to REP format
• Export to CSV - Convert GeoJSON to CSV format

Technical Details

• All tools follow IIFE pattern for browser compatibility
• No external dependencies beyond standard Web APIs
• Tools accessible via window.ToolVault.tools namespace
• Synchronous execution model as specified

Testing

cd examples/javascript-bundle
npm install
npm test

All 19 tests pass successfully.

Next Steps

• Deploy bundle to GitHub Pages for UI testing
• Integrate with ToolVault UI components
• Use as reference for Python tool implementations

Closes #1