maintenance(docs): Add retext-spell to check spelling (#24372)

* try to get spelling to work

* more stuff

* try again

* this was a mustako

* this was a mistake

* make a dictionary

* revert old docs

* updated dictionary

* fix some spelling errors

* fix some spelling errors

* update dictionary

* fix some more typos

* more stuff

* more stuff

* more stuff

* more stuff

* go through entire list

* michals name

* update script

* fix yaml

* fix API

* no-brainer

* SaaS

* CSS

* ssl and ssr

* more stuff

* weird stuff

* fix some graphql inconsistencies

* css-in-js

* misc

* deduplicate

* get rid of apostrophes

* get rid of apostrophes

* whoops

* netlify

* more american english

* Capitalize SCSS

* add retext-emoji and fix new things

* add remaining words/names to the dictionary

* fix some brand names

* some more fixes

* some more fixes

* make more things consistent

* make more things consistent

* fixes

* nodejs

* nodejs

* traceID

* more consistency stuff

* more consistency stuff

* WebPagetest

* more stuff

* lkjasdfjlkj

* lkjasdfjlkj

* more stuff

* fix

* update yarn.lock

* whoops

* fix llint

Co-authored-by: Aisha Blake <aisha@gatsbyjs.com>

yarn.lock

@@ -1519,7 +1519,12 @@
   dependencies:
     "@types/node" "*"
 
-"@types/node@*", "@types/node@^8.5.7":
+"@types/node@*":
+  version "14.0.13"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.0.13.tgz#ee1128e881b874c371374c1f72201893616417c9"
+  integrity sha512-rouEWBImiRaSJsVA+ITTFM6ZxibuAlTuNOCyxVbwreu6k6+ujs7DfnU9o+PShFhET78pMBl3eH+AGSI5eOTkPA==
+
+"@types/node@^8.5.7":
   version "8.10.61"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-8.10.61.tgz#d299136ce54bcaf1abaa4a487f9e4bedf6b0d393"
   integrity sha512-l+zSbvT8TPRaCxL1l9cwHCb0tSqGAGcjPJFItGGYat5oCTiq1uQQKYg5m7AF1mgnEBzFXGLJ2LRmNjtreRX76Q==