feat: add functional plugin icons

plugins/cjysa-pdf/.codex-plugin/plugin.json

@@ -20,6 +20,8 @@
     "capabilities": ["Interactive", "Read", "Write"],
     "websiteURL": "https://git.cjysa.top/CJYSA/codex-free-market",
     "brandColor": "#DC2626",
+    "composerIcon": "./assets/icon.png",
+    "logo": "./assets/logo.png",
     "defaultPrompt": [
       "提取并总结这个 PDF 的内容。",
       "把这些 PDF 合并并检查页面是否正常。",

plugins/cjysa-pdf/assets/icon.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
+  <rect width="512" height="512" rx="112" fill="#DC2626"/>
+  <path d="M146 92h166l54 54v274H146z" fill="#fff"/>
+  <path d="M312 92v70h54" fill="#FECACA"/>
+  <path d="M184 248c35-46 68-48 92-8 24 40 46 85 64 85 15 0 29-18 42-54" fill="none" stroke="#DC2626" stroke-width="22" stroke-linecap="round"/>
+  <path d="M184 350h144" stroke="#DC2626" stroke-width="22" stroke-linecap="round"/>
+</svg>