[API] Move extensions into separate package

imgui-binding/src/main/java/imgui/extension/imnodes/flag/ImNodesPinShape.java

@@ -0,0 +1,16 @@
+package imgui.extension.imnodes;
+
+/**
+ * This enum controls the way attribute pins look.
+ */
+public final class ImNodesPinShape {
+    private ImNodesPinShape() {
+    }
+
+    public static final int Circle = 0;
+    public static final int CircleFilled = 1;
+    public static final int Triangle = 2;
+    public static final int TriangleFilled = 3;
+    public static final int Quad = 4;
+    public static final int QuadFilled = 5;
+}