feat(软件图标): 新增PNG和ICO图标支持

assets/webui/index.html

@@ -6,6 +6,7 @@
 	<meta name="theme-color" content="#fbfcfd">
 	<title>OFDGo WebUI - OFD编辑器</title>
 	<link rel="manifest" href="./ofdgo.json">
+	<link rel="icon" type="image/x-icon" sizes="16x16 32x32 48x48 64x64 128x128 256x256" href="./ofdgo.ico">
 	<link rel="icon" type="image/svg+xml" href="./ofdgo.svg">
 	<link rel="stylesheet" href="./ofdgo.css">
 </head>