Update README with compact style focused on Go Struct Mapping Visualizer

[Copilot]

Replaced the generic Vite + React + TypeScript template README with project-specific content using a compact style format.

Changes Made

• Project Focus: Updated title and description to reflect the actual purpose - a Go Struct Mapping Visualizer
• Compact Format: Reduced content from 84 lines to 46 lines (45% reduction) while maintaining all essential information
• Clear Features Section: Added bullet points highlighting key capabilities:
  • Visual drag-and-drop mapping interface
  • Automatic Go code generation
  • Built-in Monaco editor with syntax highlighting
  • Interactive React Flow diagrams
  • Custom transformer nodes
• Prominent Live Demo: Added direct link to the GitHub Pages deployment
• Streamlined Development: Condensed setup commands into a clear code block
• Focused Tech Stack: Listed relevant technologies in scannable bullet points
• Simplified Deployment: Condensed deployment information to one concise sentence

Removed Content

• Verbose ESLint configuration examples (50+ lines) that were template boilerplate
• Generic Vite plugin explanations not relevant to end users
• Detailed ESLint setup instructions for production applications

The new README provides a much better first impression for developers discovering the project, clearly communicating its purpose and value proposition in a scannable format.

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