Move all docs to website (#3139)

* Sync README -> docs/options.md

* Sync README -> docs/*.md

* Misc fixups

* Remove markdown-toc

* Remove insert-pragma from ToC

* Never again!

* Move all docs to ./docs

* Remove yarn toc

* Fix inter-doc links

* Fix links in footer

* Clean up README.md

* Add basic description to README.md

* Use flat badges

* Move editor guides to website

* Improve prettier-ignore docs

* Fixup bad find/replace

* Add JSON to README

* Fix custom parser API link

* Fixup GitHub centering, add downloads badge

* Add 1.8 docs

* docs(website): mention markdown on homepage (#1)

* Add intro

* Add watching-files.md

* Fix markdown syntax highlighting

* Switch back to .md links

docs/watching-files.md

@@ -0,0 +1,18 @@
+---
+id: watching-files
+title: Watching For Changes
+---
+
+If you prefer to have prettier watch for changes from the command line you can use a package like [onchange](https://www.npmjs.com/package/onchange). For example:
+
+```
+npx onchange '**/*.js' -- npx prettier --write {{changed}}
+```
+
+or add the following to your `package.json`
+
+```json
+  "scripts": {
+    "prettier-watch": "onchange '**/*.js' -- prettier --write {{changed}}"
+  },
+```