Add brush texture list boundary

src/node_panel_brush.h

@@ -9,6 +9,10 @@
 #include "serializer.h"
 #include "node_button.h"
 
+namespace pp::app {
+struct BrushTextureListPlan;
+}
+
 class NodeButtonBrush : public NodeButtonCustom, public Serializer::Type
 {
 public:
@@ -38,6 +42,7 @@ class NodePanelBrush : public Node
     NodeButtonCustom* m_btn_down;
     NodeButtonCustom* m_btn_remove;
     bool m_interacted = false;
+    void execute_texture_list_plan(const pp::app::BrushTextureListPlan& plan);
 public:
     NodeScroll* m_container;
     std::string m_dir_name;