Initial samples: TodoApp and ShellDemo

Two sample applications demonstrating OpenMaui Linux:

TodoApp:
- Full task manager with NavigationPage
- CollectionView with XAML data binding
- DisplayAlert dialogs
- Grid layouts with star sizing

ShellDemo:
- Comprehensive control showcase
- Shell with flyout navigation
- All core MAUI controls demonstrated
- Real-time event logging

Both samples reference OpenMaui.Controls.Linux via NuGet.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

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+# OpenMaui Linux Samples
+
+Sample applications demonstrating [OpenMaui Linux](https://github.com/open-maui/maui-linux) - .NET MAUI on Linux.
+
+## Samples
+
+| Sample | Description |
+|--------|-------------|
+| [TodoApp](./TodoApp/) | Full-featured task manager with NavigationPage, XAML data binding, and CollectionView |
+| [ShellDemo](./ShellDemo/) | Comprehensive control showcase with Shell navigation and flyout menu |
+
+## Requirements
+
+- .NET 9.0 SDK
+- Linux with X11 (Ubuntu, Fedora, etc.)
+- SkiaSharp dependencies: `libfontconfig1-dev libfreetype6-dev`
+
+## Quick Start
+
+```bash
+# Clone the samples
+git clone https://github.com/open-maui/maui-linux-samples.git
+cd maui-linux-samples
+
+# Run TodoApp
+cd TodoApp
+dotnet run
+
+# Or run ShellDemo
+cd ../ShellDemo
+dotnet run
+```
+
+## Building for Deployment
+
+```bash
+# Build for Linux ARM64
+dotnet publish -c Release -r linux-arm64
+
+# Build for Linux x64
+dotnet publish -c Release -r linux-x64
+```
+
+## TodoApp
+
+A complete task management application demonstrating:
+- NavigationPage with toolbar and back navigation
+- CollectionView with data binding and selection
+- XAML value converters for dynamic styling
+- DisplayAlert dialogs
+- Grid layouts with star sizing
+- Entry and Editor text input
+
+![TodoApp Screenshot](docs/images/todoapp.png)
+
+## ShellDemo
+
+A comprehensive control gallery demonstrating:
+- Shell with flyout menu navigation
+- All core MAUI controls (Button, Entry, CheckBox, Switch, Slider, etc.)
+- Picker, DatePicker, TimePicker
+- CollectionView with various item types
+- ProgressBar and ActivityIndicator
+- Grid layouts
+- Real-time event logging
+
+![ShellDemo Screenshot](docs/images/shelldemo.png)
+
+## Related
+
+- [OpenMaui Linux Framework](https://github.com/open-maui/maui-linux) - The core framework
+- [NuGet Package](https://www.nuget.org/packages/OpenMaui.Controls.Linux) - Install via NuGet
+
+## License
+
+MIT License - See [LICENSE](LICENSE) for details.