Add icon: Lucide 1.58.0 SVG set, lazy parse, Must, Names

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

icon/svg/split-square-horizontal.svg

@@ -0,0 +1,16 @@
+<svg
+  class="lucide lucide-split-square-horizontal"
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M12 2v20" />
+  <path d="M16 3h3a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-3" />
+  <path d="M8 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h3" />
+</svg>