Add Godot project shell

godot/scripts/bootstrap/GameRoot.cs

@@ -0,0 +1,59 @@
+#nullable enable
+
+using Godot;
+using SideScrollerGame.Debug;
+
+namespace SideScrollerGame.Bootstrap;
+
+public partial class GameRoot : Node
+{
+    public override void _Ready()
+    {
+        m_Settings = DebugSettings.Load();
+        GD.Seed((ulong)m_Settings.Seed);
+
+        GD.Print($"Debug boot: {m_Settings.BootMode}");
+        GD.Print($"Seed: {m_Settings.Seed}");
+
+        LoadBootScene(m_Settings.BootMode);
+    }
+
+    public void LoadBootScene(DebugBootMode bootMode)
+    {
+        PackedScene? scene = bootMode switch
+        {
+            DebugBootMode.Smoke => SmokeScene,
+            _                   => MenuScene
+        };
+
+        string loadedSceneId = bootMode.ToString();
+        if (scene is null)
+        {
+            GD.PushError($"No scene configured for debug boot mode '{bootMode}'.");
+            return;
+        }
+
+        if (m_LoadedScene is not null)
+        {
+            m_LoadedScene.QueueFree();
+        }
+
+        m_LoadedScene = scene.Instantiate();
+        AddChild(m_LoadedScene);
+
+        DebugOverlay? overlay = GetNodeOrNull<DebugOverlay>("DebugOverlay");
+        if (overlay is not null && m_Settings is not null)
+        {
+            overlay.SetStatus(m_Settings, loadedSceneId);
+        }
+    }
+
+    [Export]
+    public PackedScene? MenuScene { get; set; }
+
+    [Export]
+    public PackedScene? SmokeScene { get; set; }
+
+    private Node? m_LoadedScene;
+    private DebugSettings? m_Settings;
+}