Add chapter 10 sample project

Chapter10/TemplateStudioSampleApp/Contracts/Services/IActivationService.cs

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+namespace TemplateStudioSampleApp.Contracts.Services;
+
+public interface IActivationService
+{
+    Task ActivateAsync(object activationArgs);
+}

Chapter10/TemplateStudioSampleApp/Contracts/Services/ILocalSettingsService.cs

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+namespace TemplateStudioSampleApp.Contracts.Services;
+
+public interface ILocalSettingsService
+{
+    Task<T?> ReadSettingAsync<T>(string key);
+
+    Task SaveSettingAsync<T>(string key, T value);
+}

Chapter10/TemplateStudioSampleApp/Contracts/Services/INavigationService.cs

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+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Navigation;
+
+namespace TemplateStudioSampleApp.Contracts.Services;
+
+public interface INavigationService
+{
+    event NavigatedEventHandler Navigated;
+
+    bool CanGoBack
+    {
+        get;
+    }
+
+    Frame? Frame
+    {
+        get; set;
+    }
+
+    bool NavigateTo(string pageKey, object? parameter = null, bool clearNavigation = false);
+
+    bool GoBack();
+}

Chapter10/TemplateStudioSampleApp/Contracts/Services/INavigationViewService.cs

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+using Microsoft.UI.Xaml.Controls;
+
+namespace TemplateStudioSampleApp.Contracts.Services;
+
+public interface INavigationViewService
+{
+    IList<object>? MenuItems
+    {
+        get;
+    }
+
+    object? SettingsItem
+    {
+        get;
+    }
+
+    void Initialize(NavigationView navigationView);
+
+    void UnregisterEvents();
+
+    NavigationViewItem? GetSelectedItem(Type pageType);
+}

Chapter10/TemplateStudioSampleApp/Contracts/Services/IPageService.cs

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+namespace TemplateStudioSampleApp.Contracts.Services;
+
+public interface IPageService
+{
+    Type GetPageType(string key);
+}

Chapter10/TemplateStudioSampleApp/Contracts/Services/IThemeSelectorService.cs

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+using Microsoft.UI.Xaml;
+
+namespace TemplateStudioSampleApp.Contracts.Services;
+
+public interface IThemeSelectorService
+{
+    ElementTheme Theme
+    {
+        get;
+    }
+
+    Task InitializeAsync();
+
+    Task SetThemeAsync(ElementTheme theme);
+
+    Task SetRequestedThemeAsync();
+}

Chapter10/TemplateStudioSampleApp/Contracts/Services/IWebViewService.cs

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+using Microsoft.UI.Xaml.Controls;
+using Microsoft.Web.WebView2.Core;
+
+namespace TemplateStudioSampleApp.Contracts.Services;
+
+public interface IWebViewService
+{
+    Uri? Source
+    {
+        get;
+    }
+
+    bool CanGoBack
+    {
+        get;
+    }
+
+    bool CanGoForward
+    {
+        get;
+    }
+
+    event EventHandler<CoreWebView2WebErrorStatus>? NavigationCompleted;
+
+    void Initialize(WebView2 webView);
+
+    void GoBack();
+
+    void GoForward();
+
+    void Reload();
+
+    void UnregisterEvents();
+}