[API] Add API for Dear ImGui v1.79

imgui-binding/src/main/java/imgui/internal/ImRect.java

@@ -8,7 +8,7 @@ import java.util.Objects;
  * Helper: ImRect (2D axis aligned bounding-box)
  * NB: we can't rely on ImVec2 math operators being available here!
  */
-public final class ImRect {
+public final class ImRect implements Cloneable {
     /**
      * Upper-left
      */
@@ -35,6 +35,10 @@ public final class ImRect {
         max.y = y2;
     }
 
+    public ImRect(final ImRect imRect) {
+        this(imRect.min, imRect.max);
+    }
+
     @Override
     public String toString() {
         return "ImRect{"
@@ -61,4 +65,9 @@ public final class ImRect {
     public int hashCode() {
         return Objects.hash(min, max);
     }
+
+    @Override
+    public ImRect clone() {
+        return new ImRect(this);
+    }
 }