feat: 果壳 物种日历 (#2768)

* feat:果壳 物种日历

* feat:将‘果壳 物种日历’扩展至吃货研究所，美丽也是技术活

* 全文获取使用缓存

lib/router.js

@@ -696,6 +696,7 @@ router.get('/ifanr/:channel?', require('./routes/ifanr/index'));
 
 // 果壳网
 router.get('/guokr/scientific', require('./routes/guokr/scientific'));
+router.get('/guokr/:category', require('./routes/guokr/calendar'));
 
 // 联合早报
 router.get('/zaobao/realtime/:type?', require('./routes/zaobao/realtime'));