feat(demo): add SourcePositionDemo

Author: javier-godoy

src/test/java/com/flowingcode/vaadin/addons/demo/Demo.java

@@ -35,5 +35,6 @@ public Demo() {
     addDemo(SampleDemoHighlight.class);
     addDemo(AdHocDemo.class);
     addDemo(MultiSourceDemo.class);
+    addDemo(SourcePositionDemo.class);
   }
 }

src/test/java/com/flowingcode/vaadin/addons/demo/SourcePositionDemo.java

@@ -0,0 +1,36 @@
+/*-
+ * #%L
+ * Commons Demo
+ * %%
+ * Copyright (C) 2020 - 2023 Flowing Code
+ * %%
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * #L%
+ */
+package com.flowingcode.vaadin.addons.demo;
+
+import com.vaadin.flow.component.html.Div;
+import com.vaadin.flow.component.html.Span;
+import com.vaadin.flow.router.PageTitle;
+import com.vaadin.flow.router.Route;
+
+@Route(value = "demo/source-position", layout = Demo.class)
+@PageTitle("Reversed orientation")
+@DemoSource(sourcePosition = SourcePosition.PRIMARY)
+// show-source @DemoSource(sourcePosition = SourcePosition.PRIMARY)
+public class SourcePositionDemo extends Div {
+
+  public SourcePositionDemo() {
+    add(new Span("Demo component with source defaulted to primary position"));
+  }
+}