Add a settings command (#29)

src/Valleysoft.Dredge/Program.cs

@@ -7,6 +7,7 @@
     new ImageCommand(clientFactory),
     new ManifestCommand(clientFactory),
     new RepoCommand(clientFactory),
+    new SettingsCommand(),
     new TagCommand(clientFactory),
 };
 

src/Valleysoft.Dredge/SettingsCommand.cs

@@ -0,0 +1,28 @@
+using System.CommandLine;
+using System.Diagnostics;
+
+namespace Valleysoft.Dredge;
+
+internal class SettingsCommand : Command
+{
+    public SettingsCommand()
+        : base("settings", "Opens the Dredge settings file")
+    {
+        this.SetHandler(Execute);
+    }
+
+    private void Execute()
+    {
+        // Ensure the settings are loaded which creates a default settings file if necessary
+        Settings.Load();
+
+        try
+        {
+            Process.Start(new ProcessStartInfo(Settings.SettingsPath) { UseShellExecute = true });
+        }
+        catch(Exception)
+        {
+            Console.WriteLine(Settings.SettingsPath);
+        }
+    }
+}