大会分论坛详情页（论坛议程分享海报）

### Is there an existing feature request for this? - [X] I have searched the existing feature requests ### Description - [ ] 将一个论坛的所有议程在独立页面中以时间轴形式纵向排列 - [ ] 背景图与讲师邀请函页面相同，并在最下方添加本页网址的二维码 - [ ] 渲染完成后可点击截图，用户可长按图片分享到其它 App ### Use Case - https://kaiyuanshe.cn/activity/recumCoZCaH2Hg/agenda/recE0WUrLL/invitation - https://fcc-cd.dev/fcc.chengdu/#/events ### Proposed Solution https://github.com/FreeCodeCamp-Chengdu/fcc.chengdu/issues/26