Add missing commands.

Quik/CommandMachine/CommandEngine.cs

@@ -20,7 +20,7 @@ namespace Quik.CommandMachine
 
         public QMat4 ActiveTransforms { get; }
 
-        public StyleStack Style { get; } = new StyleStack(new Quik.Style());
+        public StyleStack Style { get; } = new StyleStack(new Style());
 
         protected CommandEngine()
         {
@@ -99,6 +99,16 @@ namespace Quik.CommandMachine
                 case Command.PopZ:
                     _zIndex = _zStack.TryPop(out int zindex) ? zindex : 0;
                     break;
+                case Command.PushStyle:
+                    Style.Push(iterator.Dequeue().As<Style>());
+                    break;
+                case Command.StoreStyle:
+                    Style.Pop();
+                    Style.Push(iterator.Dequeue().As<Style>());
+                    break;
+                case Command.PopStyle:
+                    Style.Pop();
+                    break;
                 }
             }
         }

Quik/CommandMachine/CommandList.cs

@@ -109,6 +109,23 @@ namespace Quik.CommandMachine
             Enqueue(Command.PopZ);
         }
 
+        public void PushStyle(Style style)
+        {
+            Enqueue(Command.PushStyle);
+            Enqueue(new Frame(style));
+        }
+
+        public void StoreStyle(Style style)
+        {
+            Enqueue(Command.StoreStyle);
+            Enqueue(new Frame(style));
+        }
+
+        public void PopStyle()
+        {
+            Enqueue(Command.PopStyle);
+        }
+
         public void Line(in QLine line)
         {
             Enqueue(Command.Line);