Add animation panel service boundary

src/node_panel_animation.h

@@ -7,6 +7,12 @@
 #include "node_button_custom.h"
 #include "node_combobox.h"
 
+class Layer;
+
+namespace pp::app {
+struct DocumentAnimationOperationPlan;
+}
+
 class NodeAnimationFrame : public NodeButtonCustom
 {
 public:
@@ -65,6 +71,8 @@ class NodePanelAnimation : public Node
     int m_selected_frame_index = -1;
     uint32_t m_selected_frame_layer_id = 0;
     float m_playback_timer = 0;
+
+    void execute_animation_plan(const pp::app::DocumentAnimationOperationPlan& plan, Layer* layer = nullptr);
 public:
     using this_class = NodePanelAnimation;
     using parent = Node;