Add editable param to area helper

Helpers.md

@@ -27,6 +27,7 @@ Parameters:
 |----------|-----------|-----------
 | name     | String    |Name of the area element
 | area     | String    |Name of the area definition node such as ContentArea, Footer or Stage.
+| editable | boolean   |By setting the value to false you can prevent area editing.
 
 Additional key-value params are added to the context. Can be used to pass key-value pairs to components inside this area.
 #### supplier-page

light-development/src/main/java/com/merkle/oss/magnolia/renderer/handlebars/helpers/magnolia/CmsAreaTemplateHelper.java

@@ -60,6 +60,7 @@ public Optional<CharSequence> applySafe(final Object ignored, final Options opti
 		final String name = options.hash("name");
 		// area name for BE, ignored by FE
 		final String area = StringUtils.defaultIfBlank(options.hash("area"), name);
+		final boolean editable = options.hash("editable", true);
 
 		final RenderingModel<?> model = getRenderingModel(options.context).orElseThrow(() ->
 				new IllegalArgumentException("Rendering model not present!")
@@ -85,6 +86,8 @@ public Optional<CharSequence> applySafe(final Object ignored, final Options opti
 		areaElement.setName(name);
 		areaElement.setContextAttributes(options.hash);
 
+		areaElement.setEditable(editable);
+
 		return Optional.of(render(areaElement));
 	}