新增個人 icon（icon.svg / icon.png）並登記於 README

icon.svg

@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" width="512" height="512">
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#0f172a"/>
+      <stop offset="1" stop-color="#1e293b"/>
+    </linearGradient>
+    <linearGradient id="tie" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0" stop-color="#fbbf24"/>
+      <stop offset="1" stop-color="#d97706"/>
+    </linearGradient>
+  </defs>
+  <rect width="512" height="512" rx="96" fill="url(#bg)"/>
+  <circle cx="256" cy="264" r="168" fill="none" stroke="#38bdf8" stroke-width="8" opacity="0.35"/>
+  <g>
+    <path d="M247 264 L128 200 C118 195 108 202 108 213 L108 315 C108 326 118 333 128 328 Z" fill="url(#tie)"/>
+    <path d="M265 264 L384 200 C394 195 404 202 404 213 L404 315 C404 326 394 333 384 328 Z" fill="url(#tie)"/>
+    <rect x="234" y="232" width="44" height="64" rx="10" fill="#f59e0b"/>
+    <rect x="244" y="248" width="24" height="32" rx="6" fill="#0f172a" opacity="0.35"/>
+  </g>
+</svg>