refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Medium-24px/SVG/Action/Search-Page-MD.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="24px" height="24px" viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>🧩 Icons/Simple/Action/24px/Search-Page-MD</title>
+    <g id="🧩-Icons/Simple/Action/24px/Search-Page-MD" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <path d="M16,2 L16,6 L13.999,6 L14,4 L4,4 L4,20 L12,19.999 L12,20 L16,20 L16,22 L2,22 L2,2 L16,2 Z M16.5260265,9.46283488 C18.3109478,11.2477562 18.4624257,14.0475692 16.98046,16.0047487 L18.2918244,16.8791861 L22,20.5873617 L20.5873617,22 L16.8791861,18.2918244 L16.0055565,16.9798482 C14.0483397,18.4624673 11.2480018,18.3111934 9.46283488,16.5260265 C7.51238837,14.57558 7.51238837,11.4132814 9.46283488,9.46283488 C11.4132814,7.51238837 14.57558,7.51238837 16.5260265,9.46283488 Z M10.6988934,10.6988934 C9.43110318,11.9666836 9.43110318,14.0221777 10.6988934,15.289968 C11.9666836,16.5577582 14.0221777,16.5577582 15.289968,15.289968 C16.5577582,14.0221777 16.5577582,11.9666836 15.289968,10.6988934 C14.0221777,9.43110318 11.9666836,9.43110318 10.6988934,10.6988934 Z" id="Primary" fill="#000000"></path>
+    </g>
+</svg>