#1542 Adding gantt to showcases

cypress/platform/showcase_base.html

@@ -93,6 +93,31 @@
                 John-->Alice: Great!
             end
       </div>
+      <div class="mermaid width height" >
+%%{init: {'securityLevel': 'loose', 'theme':'base'}}%%
+
+classDiagram
+	Animal "1" <|-- Duck
+	Animal <|-- Fish
+	Animal <--o Zebra
+	Animal : +int age
+	Animal : +String gender
+	Animal: +isMammal()
+	Animal: +mate()
+	class Duck{
+		+String beakColor
+		+swim()
+		+quack()
+	}
+	class Fish{
+		-int sizeInFeet
+		-canEat()
+	}
+	class Zebra{
+		+bool is_wild
+		+run()
+	}
+      </div>
       <div class="mermaid width height">
 gantt
        dateFormat                :YYYY-MM-DD