refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Small-16px/SVG/Action/Important-Inline/Important-Fill-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/Important-Inline/Important-Fill-SM</title>
+    <g id="🧩-Icons/Simple/Action/16px/Important-Inline/Important-Fill-SM" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <path d="M8,0 C12.418278,0 16,3.581722 16,8 C16,12.418278 12.418278,16 8,16 C3.581722,16 0,12.418278 0,8 C0,3.581722 3.581722,0 8,0 Z M9,11 L7,11 L7,13 L9,13 L9,11 Z M9.5,3 L6.5,3 L7.25,10 L8.75,10 L9.5,3 Z" id="Primary" fill="#000000"></path>
+    </g>
+</svg>

frontend/static/degruyter-icons/Simple/Small-16px/SVG/Action/Important-Inline/Important-Outline-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/Important-Inline/Important-Outline-SM</title>
+    <g id="🧩-Icons/Simple/Action/16px/Important-Inline/Important-Outline-SM" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <path d="M8,0 C12.418278,0 16,3.581722 16,8 C16,12.418278 12.418278,16 8,16 C3.581722,16 0,12.418278 0,8 C0,3.581722 3.581722,0 8,0 Z M8,1.5 C4.41014913,1.5 1.5,4.41014913 1.5,8 C1.5,11.5898509 4.41014913,14.5 8,14.5 C11.5898509,14.5 14.5,11.5898509 14.5,8 C14.5,4.41014913 11.5898509,1.5 8,1.5 Z M9,11 L9,13 L7,13 L7,11 L9,11 Z M9.5,3 L8.75,10 L7.25,10 L6.5,3 L9.5,3 Z" id="Primary" fill="#000000"></path>
+    </g>
+</svg>