Add Web Version with ASP.NET Blazor and FluentUI

[Copilot]

This PR adds a complete web version of the EDI Viewer using ASP.NET Blazor Server with Microsoft FluentUI components, providing a modern web-based alternative to the existing WPF and WinUI desktop applications.

Key Features

🌐 Modern Web Interface: Built with ASP.NET Blazor Server and FluentUI components for a clean, responsive design that matches the Aspire aesthetic.

📄 1:1 JSON Compatibility: The web version uses the exact same JSON format definitions as the desktop versions, ensuring complete compatibility and no migration needed for existing format configurations.

🔄 Reused Core Logic: Successfully adapted the existing Models, Parser, and Helper classes from the desktop versions with minimal changes, maintaining consistency across all platforms.

Implementation Details

• New Project: EDIViewer_Web - Blazor Server application targeting .NET 8.0
• UI Framework: Microsoft FluentUI for Blazor with Aspire-inspired design
• Core Components:
  • Home page with feature overview and navigation
  • File Viewer for uploading and processing EDI files
  • Format Management for viewing and managing JSON format definitions
• Adapted Components:
  • Models/ - Data structures for EDI parsing (copied from desktop version)
  • Parser/ - EDI file parsing logic (adapted for web context)
  • Helper/ - Utility classes modified for web environment (file handling, settings)

Technical Changes

• Added FluentUI design system with proper theming
• Created web-compatible versions of desktop helper classes
• Implemented file upload functionality for EDI files
• Built responsive layout with collapsible navigation
• Added data grids for displaying parsed EDI information
• Ensured proper error handling and user feedback

Usage

The web version provides the same core functionality as the desktop versions:

1. File Upload: Users can select and upload EDI files through the web interface
2. Format Selection: Choose from available JSON format definitions
3. Data Processing: Parse EDI files using the same logic as desktop versions
4. Data Visualization: View parsed data in structured tables and tabs

Example JSON format files work identically across all versions:

{
  "FormatName": "EDIFACT ORDERS",
  "FormatComment": "Standard EDIFACT Auftragsdaten",
  "FormatSeparator": "+",
  "FormatDetection": "UNB",
  "FormatTypes": [...]
}

The web version maintains full compatibility with existing format definitions while providing the convenience and accessibility of a web-based solution.

Fixes #15.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.