feat: Dynamic command loader, default command with module registry

Commands/Container/Module.cs

@@ -0,0 +1,26 @@
+using Automancer.Command.Image;
+using Automancer.Common;
+using Spectre.Console.Cli;
+
+namespace Automancer.Command.Container;
+
+public class Module : ICommandModuleWithRegistry
+{
+    public void Configure(IConfigurator config)
+    {
+        // No implementation needed here
+    }
+
+    public void Configure(IConfigurator config, CommandRegistry registry)
+    {
+        config.AddBranch("container", container =>
+        {
+            var description = "Container operations";
+            
+            container.SetDescription(description);
+            registry.Add("container", description);
+
+            container.AddCommand<PsCommand>("ps").WithDescription("List containers");
+        });
+    }
+}