feat: complete Phase 1 React frontend with GitHub Pages deployment

[IanMayo]

Summary

This PR completes Phase 1 of the ToolVault implementation, delivering a fully functional React/TypeScript frontend with GitHub Pages deployment capabilities.

Key Features Implemented

• Complete React/TypeScript SPA with metadata-driven UI generation
• Tool Discovery & Browsing with search, filtering, and responsive grid/list views
• Dynamic Tool Execution Interface with parameter forms generated from metadata
• Phase 0 JavaScript Bundle Integration supporting all 12 tools across 5 categories
• GitHub Pages Deployment Pipeline with automated CI/CD via GitHub Actions
• Comprehensive Documentation including deployment and stakeholder testing guides

Technical Highlights

• Metadata-Driven Architecture: All UI components generated from index.json tool metadata
• Type-Safe Implementation: Strict TypeScript with comprehensive interfaces and validation
• Responsive Design: Mobile-first approach with CSS Grid and Flexbox layouts
• Performance Optimized: Code splitting, lazy loading, and efficient bundle management
• Testing Coverage: Playwright E2E tests and comprehensive tool validation

Deployment Ready

• GitHub Actions Workflow: Automated build, test, and deployment on push to main
• SPA Routing Support: 404.html fallback for client-side routing compatibility
• Issue Templates: Bug reports, feature requests, and tool-specific feedback forms
• Production Testing: Verified all Phase 0 tools function correctly in build environment

Phase 0 Tool Integration

All 12 JavaScript tools fully integrated and functional:

Transform Tools: translate-features, flip-horizontal, flip-vertical
Analysis Tools: calculate-speed-series, calculate-direction-series
Statistics Tools: average-speed, speed-histogram
Processing Tools: smooth-polyline
I/O Tools: import-rep, export-rep, export-csv

Test Plan

• Verify GitHub Actions workflow builds and deploys successfully
• Test all tool discovery and browsing functionality
• Execute each of the 12 Phase 0 tools with sample data
• Validate responsive design on desktop and mobile devices
• Confirm SPA routing works correctly on GitHub Pages
• Review deployment documentation and stakeholder testing guide

Ready for stakeholder review and feedback collection to inform Phase 2 development priorities.