org-roam
org-roam+orb+zotero
参考：
https://github.com/org-roam/org-roam https://www.orgroam.com/ https://www.zmonster.me/2020/06/27/org-roam-introduction.html https://emacs-china.org/t/org-roam-org-brain/12422/58 https://www.youtube.com/watch?v=oyEMlIxIHXs&feature=youtu.be https://bbs.pku.edu.cn/v2/mobile/post-read.php?bid=13&threadid=17858086 https://zhuanlan.zhihu.com/p/137534800