Add example for justify text

examples/vector-labels-justify-text.html

@@ -0,0 +1,14 @@
+---
+layout: example.html
+title: Vector Labels - Justify Text
+shortdesc: Example of text justification within a label.
+docs: >
+  This example showcases how the text can be justified within the label box.
+  By default, the text is justified according to the `textAlign` option.
+  However, this option justifies the label itself according to the setting.
+  If one wants to change this behavior, it is possible to use the `justify` text style option.
+  For more information, see the discussion:
+  https://github.com/openlayers/openlayers/issues/13481
+tags: "vector, openstreetmap, label, rich-text"
+---
+<div id="map" class="map"></div>