feat(playground): use a height of 100dvh with fallback to original 100vh (#182)

Prevents bottom part of the playground hiding under mobile browsers bottom bar

Author: pdanpdan

index-dist.html

@@ -11,6 +11,7 @@
       }
       #app {
         height: 100vh;
+        height: 100dvh;
       }
     </style>
 

index.html

@@ -11,6 +11,7 @@
       }
       #app {
         height: 100vh;
+        height: 100dvh;
       }
     </style>