Add AbstractFcAppRouterLayout demo

Author: javier-godoy

src/test/java/com/flowingcode/addons/applayout/AbstractLayoutDemo.java

@@ -0,0 +1,21 @@
+package com.flowingcode.addons.applayout;
+
+import com.flowingcode.addons.applayout.menu.MenuItem;
+import com.vaadin.flow.component.HasElement;
+
+public class AbstractLayoutDemo extends AbstractFcAppRouterLayout{
+
+	@Override
+	protected void configure(AppLayout app) {
+		app.setMenuItems(
+			new MenuItem("Item 1"),
+			new MenuItem("Item 2")
+		);		
+	}
+
+	@Override
+	public void showRouterLayoutContent(AppLayout app, HasElement content) {
+		super.showRouterLayoutContent(app, content);
+	}
+	
+}

src/test/java/com/flowingcode/addons/applayout/AbstractLayoutView.java

@@ -0,0 +1,12 @@
+package com.flowingcode.addons.applayout;
+
+import com.vaadin.flow.component.html.Div;
+import com.vaadin.flow.component.html.Span;
+import com.vaadin.flow.router.Route;
+
+@Route(value="view", layout = AbstractLayoutDemo.class)
+public class AbstractLayoutView extends Div {
+
+	{add(new Span("Hello world"));}
+	
+}