Add switch extension (#1091)

docs/extensions.html

@@ -3,6 +3,11 @@ title: Extensions
 layout: default
 route: extensions
 extensions:
+- name: bulma-switch
+  url: https://github.com/Wikiki/bulma-switch
+  slug: bulma-switch
+  width: 184
+  height: 172
 - name: bulma-divider
   url: https://github.com/Wikiki/bulma-divider
   slug: bulma-divider