feat: support start and pause all tasks (#121)

ui/flutter/assets/locales/en_US.json

@@ -50,6 +50,8 @@
   "notSet": "NS",
   "set": "SET",
   "effectAfterRestart": "Effect after restart",
+  "startAll": "Start All",
+  "pauseAll": "Pause All",
   "deleteTask": "Delete Task",
   "deleteTaskTip": "Keep downloaded files",
   "delete": "Delete",

ui/flutter/assets/locales/fa_IR.json

@@ -47,6 +47,8 @@
     "notSet": "NS",
     "set": "SET",
     "effectAfterRestart": "Effect after restart",
+    "startAll": "شروع همه",
+    "pauseAll": "توقف همه",
     "deleteTask": "پاک کردن کار",
     "deleteTaskTip": "فایل های دانلود شده را نگه دارد",
     "delete": "پاک کردن",

ui/flutter/assets/locales/ru_RU.json

@@ -50,6 +50,8 @@
   "notSet": "Не установлено",
   "set": "Установлено",
   "effectAfterRestart": "Эффект после перезагрузки",
+  "startAll": "Запустить все",
+  "pauseAll": "Приостановить все",
   "deleteTask": "Удалить задачу",
   "deleteTaskTip": "Сохранить загруженные файлы",
   "delete": "Удалить",

ui/flutter/assets/locales/zh_CN.json

@@ -50,6 +50,8 @@
   "notSet": "未设置",
   "set": "已设置",
   "effectAfterRestart": "此配置项将在重启应用后生效",
+  "startAll": "全部开始",
+  "pauseAll": "全部暂停",
   "deleteTask": "删除任务",
   "deleteTaskTip": "保留已下载的文件",
   "delete": "删除",