refactor programmable modules

Modules/SubModule.cs

@@ -0,0 +1,13 @@
+using Godot;
+using Nocturnis.Enigmos.Modules;
+
+namespace Enigmos.Modules;
+
+public class SubModule : BaseModule
+{
+    public IBaseModule? ParentModule { get; set; }
+    public sealed override Vector2 PositionToBoard => 
+        base.PositionToBoard + (ParentModule?.PositionToBoard ?? Vector2.Zero);
+    protected sealed override bool Draggable => false;
+    protected sealed override bool HasManual => false;
+}