feat(api): use uintptr_t instead of intptr_t for pointers (#265)

Image methods now accept the `long` type instead of `int`,
as they are expected to work with pointers as well.

imgui-binding/src/generated/java/imgui/extension/imguifiledialog/ImGuiFileDialog.java

@@ -1586,6 +1586,6 @@ public final class ImGuiFileDialog {
     }
 
     private static native long nGetUserDatas(); /*
-        return (intptr_t)ImGuiFileDialog::Instance()->GetUserDatas();
+        return (uintptr_t)ImGuiFileDialog::Instance()->GetUserDatas();
     */
 }