Add badger illust

packages/preset-themes/src/styles/hufflepuff.scss

@@ -34,7 +34,7 @@
   &, body {
     background-image: url('../images/hufflepuff/hufflepuff-light-bg.svg');
     background-attachment: fixed;
-    background-position: bottom;
+    background-position: bottom right;
     background-size: cover;
   }
 }
@@ -74,7 +74,7 @@
   &, body {
     background-image: url('../images/hufflepuff/hufflepuff-dark-bg.svg');
     background-attachment: fixed;
-    background-position: bottom;
+    background-position: bottom right;
     background-size: cover;
   }
 }