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>

TodoApp/README.md

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+# TodoApp Sample
+
+A complete task management application demonstrating OpenMaui Linux capabilities with real-world XAML patterns.
+
+## Features
+
+- **NavigationPage** - Full page navigation with back button support
+- **CollectionView** - Scrollable list with data binding and selection
+- **XAML Data Binding** - Value converters for dynamic styling
+- **DisplayAlert Dialogs** - Confirmation dialogs for delete actions
+- **Grid Layouts** - Complex layouts with star sizing for expanding content
+- **Entry & Editor** - Single and multi-line text input
+- **Border with RoundRectangle** - Modern card-style UI
+- **ToolbarItems** - Navigation bar actions
+
+## Screenshots
+
+The app consists of three pages:
+
+1. **TodoListPage** - Shows all tasks with completion status indicators
+2. **NewTodoPage** - Create a new task with title and notes
+3. **TodoDetailPage** - View/edit task details, mark complete, or delete
+
+## Architecture
+
+```
+TodoApp/
+├── App.cs                    # Application entry with NavigationPage
+├── Program.cs                # Linux platform bootstrap
+├── MauiProgram.cs            # MAUI app builder
+├── TodoItem.cs               # Data model
+├── TodoService.cs            # In-memory data store
+├── TodoListPage.xaml(.cs)    # Main list view
+├── NewTodoPage.xaml(.cs)     # Create task page
+└── TodoDetailPage.xaml(.cs)  # Task detail/edit page
+```
+
+## XAML Highlights
+
+### Value Converters
+The app uses custom converters for dynamic styling based on completion status:
+- `CompletedToColorConverter` - Gray text for completed items
+- `CompletedToTextDecorationsConverter` - Strikethrough for completed items
+- `CompletedToOpacityConverter` - Fade completed items
+- `AlternatingRowColorConverter` - Alternating background colors
+
+### ResourceDictionary
+```xml
+<ContentPage.Resources>
+    <Color x:Key="PrimaryColor">#5C6BC0</Color>
+    <Color x:Key="AccentColor">#26A69A</Color>
+    <Color x:Key="TextPrimary">#212121</Color>
+</ContentPage.Resources>
+```
+
+### CollectionView with DataTemplate
+```xml
+<CollectionView SelectionMode="Single" SelectionChanged="OnSelectionChanged">
+    <CollectionView.ItemTemplate>
+        <DataTemplate x:DataType="local:TodoItem">
+            <Border BackgroundColor="{StaticResource CardBackground}">
+                <Label Text="{Binding Title}" />
+            </Border>
+        </DataTemplate>
+    </CollectionView.ItemTemplate>
+</CollectionView>
+```
+
+### Grid with Star Rows (Expanding Editor)
+```xml
+<Grid RowDefinitions="Auto,Auto,*,Auto,Auto" Padding="20">
+    <!-- Row 0: Title section (Auto) -->
+    <!-- Row 1: Notes label (Auto) -->
+    <!-- Row 2: Editor - expands to fill (*) -->
+    <!-- Row 3: Status section (Auto) -->
+    <!-- Row 4: Created date (Auto) -->
+</Grid>
+```
+
+## Building and Running
+
+```bash
+# From the maui-linux-push directory
+cd samples/TodoApp
+dotnet publish -c Release -r linux-arm64
+
+# Run on Linux
+./bin/Release/net9.0/linux-arm64/publish/TodoApp
+```
+
+## Controls Demonstrated
+
+| Control | Usage |
+|---------|-------|
+| NavigationPage | App navigation container |
+| ContentPage | Individual screens |
+| CollectionView | Task list with selection |
+| Grid | Page layouts |
+| VerticalStackLayout | Vertical grouping |
+| HorizontalStackLayout | Horizontal grouping |
+| Label | Text display |
+| Entry | Single-line input |
+| Editor | Multi-line input |
+| Button | Toolbar actions |
+| Border | Card styling with rounded corners |
+| CheckBox | Completion toggle |
+| BoxView | Visual separators |
+
+## License
+
+MIT License - See repository root for details.