refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Small-16px/SVG/Action/View-Modes/View-Modes-Dark-Mode-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/View-Modes/View-Modes-Dark-Mode-SM</title>
+    <g id="🧩-Icons/Simple/Action/16px/View-Modes/View-Modes-Dark-Mode-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 M8,1.75 L8,14.25 L8,14.25 C11.4517797,14.25 14.25,11.4517797 14.25,8 C14.25,4.54822031 11.4517797,1.75 8,1.75 Z" id="Primary" fill="#000000"></path>
+    </g>
+</svg>

frontend/static/degruyter-icons/Simple/Small-16px/SVG/Action/View-Modes/View-Modes-Light-Mode-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/View-Modes/View-Modes-Light-Mode-SM</title>
+    <g id="🧩-Icons/Simple/Action/16px/View-Modes/View-Modes-Light-Mode-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 M8,1.75 L8,14.25 L8,14.25 C11.4517797,14.25 14.25,11.4517797 14.25,8 C14.25,4.54822031 11.4517797,1.75 8,1.75 Z" id="Primary" fill="#000000" transform="translate(8.000000, 8.000000) scale(-1, 1) translate(-8.000000, -8.000000) "></path>
+    </g>
+</svg>