Add IOCommands for shared OpenUrlCommand

StabilityMatrix.Avalonia/Helpers/IOCommands.cs

@@ -0,0 +1,19 @@
+using CommunityToolkit.Mvvm.Input;
+using StabilityMatrix.Core.Processes;
+
+namespace StabilityMatrix.Avalonia.Helpers;
+
+public static class IOCommands
+{
+    public static RelayCommand<string?> OpenUrlCommand { get; } =
+        new(
+            url =>
+            {
+                if (string.IsNullOrWhiteSpace(url))
+                    return;
+
+                ProcessRunner.OpenUrl(url);
+            },
+            url => !string.IsNullOrWhiteSpace(url)
+        );
+}