feat(plugin): citations (#984)

* feat: add rehype-citations

* feat: add citations transformer plugin

* feat: add rehype-rewrite

* feat: add csl option and add no-popover to citation links

* revert: add rehype-rewrite

04b2692 'feat: add rehype-rewrite'

* feat: use existing package for html manipulation

* fix: remove `console.log()`

package.json

@@ -63,6 +63,7 @@
     "pretty-time": "^1.1.0",
     "reading-time": "^1.5.0",
     "rehype-autolink-headings": "^7.1.0",
+    "rehype-citation": "^2.0.0",
     "rehype-katex": "^7.0.0",
     "rehype-mathjax": "^6.0.0",
     "rehype-pretty-code": "^0.13.0",