feature/book-card (#3)

Co-authored-by: Tim Rijkse <trijkse@gmail.com>
Reviewed-on: #3

js/icons/plus.js

@@ -0,0 +1,30 @@
+/**
+ * Plus Icon (Lucide)
+ * @param {Object} props - Icon properties
+ * @param {number} props.size - Icon size (default: 24)
+ * @param {string} props.color - Icon color (default: currentColor)
+ * @param {number} props.strokeWidth - Stroke width (default: 2)
+ * @returns {string} SVG string
+ */
+export function plusIcon({
+  size = 24,
+  color = "currentColor",
+  strokeWidth = 2,
+} = {}) {
+  return `
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      width="${size}"
+      height="${size}"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="${color}"
+      stroke-width="${strokeWidth}"
+      stroke-linecap="round"
+      stroke-linejoin="round"
+    >
+      <path d="M5 12h14"/>
+      <path d="M12 5v14"/>
+    </svg>
+  `;
+}