Add example interactive barcode generator web app

[rorychatt]

Summary

Adds a new web example application (BarcodeWebExample) that demonstrates barcode generation using BarcodeLib integrated with the Ivy Framework. This interactive web application showcases how to build modern web UIs in C# with Ivy.

Features

• Interactive Barcode Generator: Generate barcodes from text input across multiple symbologies (UPC-A, EAN-13, Code128, Code39, Interleaved 2 of 5, ITF-14)
• Live Preview: Real-time preview of generated barcodes with Base64-encoded PNG images
• Label Toggle: Enable/disable barcode labels for better readability
• Download Support: One-click PNG download of generated barcodes
• Modern UI: Split-panel layout built with Ivy UI primitives

Technical Details

• Built with Ivy Framework (.NET 9.0)
• Uses BarcodeLib NuGet package for barcode generation
• SkiaSharp for image rendering and encoding
• Docker support with multi-stage build and font dependencies for SkiaSharp
• Single C# view (Apps/BarcodeLibApp.cs) handling all UI logic

Files Added

• BarcodeWebExample/ - Complete web application project
  • Apps/BarcodeLibApp.cs - Main application view
  • Program.cs - Application entry point
  • Dockerfile - Containerized deployment configuration
  • README.md - Comprehensive documentation with setup instructions

How to Test

1. Navigate to BarcodeWebExample
2. Run dotnet watch
3. Open browser to http://localhost:5010
4. Enter barcode data, select symbology, and generate preview

Related

• Demonstrates integration of BarcodeLib with modern web frameworks
• Example of building interactive UIs entirely in C# with Ivy