Add rendering implementation for LWJGL

imgui-binding/src/main/java/imgui/ImGuiInputTextData.java

@@ -0,0 +1,8 @@
+package imgui;
+
+public class ImGuiInputTextData {
+    public int size;
+    public int maxChar = -1;
+    public String allowedChar = "";
+    boolean isDirty;
+}