[WIP] Adapt sample code for widget provider implementation

[Copilot]

Implementation plan for C# Windows App Widget Provider with AOT support:

• Create .NET 10 project structure with AOT configuration
• Implement widget provider classes (WidgetProvider, CompactWidgetInfo)
• Create widget template and data files
• Add package manifest (Package.appxmanifest)
• Configure widget definitions (widget-config.json)
• Add Program.cs with COM activation support
• Configure project for Windows App SDK and widgets
• Test build with AOT compilation

Original prompt

This sample code is adapted from Implement a widget provider in a C# Windows App

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