feat: support create task directly (#262)

ui/flutter/assets/locales/en_US.json

@@ -12,6 +12,7 @@
   "donate": "Donate",
   "exit": "Exit",
   "create": "Create Task",
+  "directDownload": "Direct Download",
   "advancedOptions": "Advanced Options",
   "downloadLink": "Download Link",
   "downloadLinkValid": "Please enter the download link",

ui/flutter/assets/locales/zh_CN.json

@@ -12,6 +12,7 @@
   "donate": "打赏",
   "exit": "退出",
   "create": "创建任务",
+  "directDownload": "直接下载",
   "advancedOptions": "高级选项",
   "downloadLink": "下载链接",
   "downloadLinkValid": "请输入下载链接",