feat(DevTools): Add LaunchView property to DevToolsOptions

src/Avalonia.Diagnostics/Diagnostics/DevToolsOptions.cs

@@ -52,5 +52,10 @@ public class DevToolsOptions
         /// Get or set Focus Highlighter <see cref="Brush"/>
         /// </summary>
         public IBrush? FocusHighlighterBrush { get; set; }
+
+        /// <summary>
+        /// Set the <see cref="DevToolsViewKind">kind</see> of diagnostic view that show at launch of DevTools
+        /// </summary>
+        public DevToolsViewKind LaunchView { get; init; }
     }
 }

src/Avalonia.Diagnostics/Diagnostics/DevToolsViewKind.cs

@@ -0,0 +1,20 @@
+namespace Avalonia.Diagnostics;
+
+/// <summary>
+/// Kinds of diagnostic views available in DevTools
+/// </summary>
+public enum DevToolsViewKind
+{
+    /// <summary>
+    /// The Logical Tree diagnostic view
+    /// </summary>
+    LogicalTree,
+    /// <summary>
+    /// The Visual Tree diagnostic view
+    /// </summary>
+    VisualTree,
+    /// <summary>
+    /// Events diagnostic view
+    /// </summary>
+    Events,
+}

src/Avalonia.Diagnostics/Diagnostics/ViewModels/MainViewModel.cs

@@ -338,6 +338,7 @@ public void SetOptions(DevToolsOptions options)
             StartupScreenIndex = options.StartupScreenIndex;
             ShowImplementedInterfaces = options.ShowImplementedInterfaces;
             FocusHighlighter = options.FocusHighlighterBrush;
+            SelectedTab = (int)options.LaunchView;
         }
 
         public bool ShowImplementedInterfaces