Rainfall: Add search box to the search page

rainfall/templates/search.html

@@ -3,7 +3,7 @@
 
 <!-- wp:group {"layout":{"inherit":true}} -->
 <div class="wp-block-group"><!-- wp:group {"align":"wide"} -->
-<div class="wp-block-group alignwide"><!-- wp:query-title {"type":"archive"} /--></div>
+<div class="wp-block-group alignwide"><!-- wp:search {"label":"Search","showLabel":false,"buttonText":"Search","buttonUseIcon":true} /--></div>
 <!-- /wp:group -->
 
 <!-- wp:spacer {"height":"12px"} -->