Move samples to dedicated repository

Samples are now in https://github.com/open-maui/maui-linux-samples

This keeps the framework repo focused and allows samples to:
- Reference NuGet package (real-world usage)
- Be cloned independently
- Have their own release cycle

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

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

samples/TodoApp/TodoService.cs

@@ -1,61 +0,0 @@
-// TodoService - Manages todo items
-
-using System.Collections.ObjectModel;
-
-namespace TodoApp;
-
-public class TodoService
-{
-    private static TodoService? _instance;
-    public static TodoService Instance => _instance ??= new TodoService();
-
-    private int _nextId = 1;
-
-    public ObservableCollection<TodoItem> Todos { get; } = new();
-
-    private TodoService()
-    {
-        // Add sample todos with varying lengths to test MaxLines=2 with ellipsis
-        AddTodo("Learn OpenMaui Linux", "Explore the SkiaSharp-based rendering engine for .NET MAUI on Linux desktop. This is a very long description that should wrap to multiple lines and demonstrate the ellipsis truncation feature when MaxLines is set to 2.");
-        AddTodo("Build amazing apps", "Create cross-platform applications that run on Windows, macOS, iOS, Android, and Linux! With OpenMaui, you can write once and deploy everywhere.");
-        AddTodo("Share with the community", "Contribute to the open-source project and help others build great Linux apps. Join our growing community of developers who are passionate about bringing .NET MAUI to Linux.");
-    }
-
-    public TodoItem AddTodo(string title, string notes = "")
-    {
-        var todo = new TodoItem
-        {
-            Id = _nextId++,
-            Index = Todos.Count, // Set index for alternating row colors
-            Title = title,
-            Notes = notes,
-            DueDate = DateTime.Today.AddDays(7)
-        };
-        Todos.Add(todo);
-        return todo;
-    }
-
-    /// <summary>
-    /// Refreshes the Index property on all items for alternating row colors.
-    /// </summary>
-    public void RefreshIndexes()
-    {
-        for (int i = 0; i < Todos.Count; i++)
-        {
-            Todos[i].Index = i;
-        }
-    }
-
-    public TodoItem? GetTodo(int id)
-    {
-        return Todos.FirstOrDefault(t => t.Id == id);
-    }
-
-    public void DeleteTodo(TodoItem todo)
-    {
-        Todos.Remove(todo);
-    }
-
-    public int CompletedCount => Todos.Count(t => t.IsCompleted);
-    public int TotalCount => Todos.Count;
-}