feat: login from token in widget

public/locales/en/setting.json

@@ -249,6 +249,7 @@
     "custom_style_tip": "if you want customize the widget position more precisely, use the widget element ID in your HTML or CSS file, like this",
     "param_host": "Assign the user chatting with visitor(User ID)",
     "param_auto_reg": "true: Auto register a new user if not exist, false: need visitor to input email to register",
+    "param_login_token": "The login token generated by yourself's account, for more details, please refer to: https://doc.voce.chat/zh-cn/login-with-other-account.",
     "param_theme_color": "The theme color of widget",
     "param_close_width": "The width while widget closed",
     "param_close_height": "The height while widget closed",

public/locales/zh/setting.json

@@ -242,6 +242,7 @@
     "custom_style_tip": "如果你想更精确控制挂件的样式，可以借助 widget 元素的 ID，自行写 CSS 样式，加到自己的 html 或者 css 文件中，如下所示：",
     "param_host": "指定和谁聊天 (用户 ID)",
     "param_auto_reg": "true:访客无需输入邮箱，直接注册;false:访客需要输入邮箱注册",
+    "param_login_token": "自有账号生成的登录 token，详见:https://doc.voce.chat/zh-cn/login-with-other-account",
     "param_theme_color": "挂件的主题色",
     "param_close_width": "挂件关闭态的宽度",
     "param_close_height": "挂件关闭态的高度",