Add <memory> header to display and window headers; refactor display manager to use IsPrimary() method

This commit includes the addition of the <memory> header in both display.h and window.h files to support smart pointer usage. Additionally, the display manager's GetPrimary() method has been updated to use the IsPrimary() method for improved clarity and consistency in checking primary displays.

Author: lijy91

src/display.h

@@ -2,6 +2,7 @@
 #include <string>
 #include "foundation/native_object_provider.h"
 #include "geometry.h"
+#include <memory>
 
 namespace nativeapi {
 

src/platform/windows/display_manager_windows.cpp

@@ -47,7 +47,7 @@ std::vector<Display> DisplayManager::GetAll() {
 Display DisplayManager::GetPrimary() {
   std::vector<Display> displays = GetAll();
   for (const auto& display : displays) {
-    if (display.isPrimary) {
+    if (display.IsPrimary()) {
       return display;
     }
   }

src/window.h

@@ -2,6 +2,7 @@
 #include <string>
 #include "geometry.h"
 #include "foundation/native_object_provider.h"
+#include <memory>
 
 namespace nativeapi {