Cathay Award Flight Finder

Adds an award flight finder panel to Cathay Pacific booking pages.

- Adds a search panel on supported Cathay Pacific pages. - Saves the user's last entered route, date, passenger count, and language preference locally in the browser. - Supports batch award availability searches across dates and comma-separated airport codes. - Displays available cabins, flight details, and estimated Cathay points where the data is available. -在支持的国泰航空页面上添加搜索面板。 -在浏览器中本地保存用户最后输入的路线、日期、乘客数量和语言偏好。 -支持跨日期和逗号分隔的机场代码的批量奖励可用性搜索。 -显示可用的客舱、航班详情和有数据的预计国泰点。