refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Small-16px/SVG/Action/Search-Page-SM.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="16px" height="16px" viewBox="0 0 16 16" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>🧩 Icons/Simple/Action/16px/Search-Page-SM</title>
+    <g id="🧩-Icons/Simple/Action/16px/Search-Page-SM" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <path d="M12,0 L12,4 L10,4 L10,2 L2,2 L2,14 L5,14 L5,16 L0,16 L0,0 L12,0 Z M13.0710678,7.21320344 C14.4356319,8.5777675 14.6490895,10.6575374 13.7114406,12.2458596 L16,14.5355339 L14.5355339,16 L12.2467848,13.7108943 C10.6583451,14.6491723 8.57803246,14.4358968 7.21320344,13.0710678 C5.59559885,11.4534632 5.59559885,8.83080802 7.21320344,7.21320344 C8.83080802,5.59559885 11.4534632,5.59559885 13.0710678,7.21320344 Z M8.49461127,8.49461127 C7.58470869,9.40451384 7.58470869,10.8797574 8.49461127,11.78966 C9.40451384,12.6995626 10.8797574,12.6995626 11.78966,11.78966 C12.6995626,10.8797574 12.6995626,9.40451384 11.78966,8.49461127 C10.8797574,7.58470869 9.40451384,7.58470869 8.49461127,8.49461127 Z" id="Primary" fill="#000000"></path>
+    </g>
+</svg>