Improve release script & enable versioning documentation (#1521)

* Add version selection page

* Update the CDN urls in the documentation

* Generate new version and publish documentation in release script

* Update CDN urls when NEXT_VERSION is not provided

* Remove bower-related from release script

* Improve instructions running on the release branch 

and without next version

* Add a suffix to the branch name

* Update CSS stylesheet replacement

* Update release.sh

* Change npm to Yarn

* Fix calling `version` script

* Run `prestart` in `version`

* Wrap `Latest Version` descriptions with p tag

* Explicitly specify files to commit in the website

website/package.json

@@ -5,7 +5,7 @@
     "build": "npm run prestart && docusaurus-build",
     "publish-gh-pages": "npm run prestart && docusaurus-publish",
     "write-translations": "docusaurus-write-translations",
-    "version": "docusaurus-version",
+    "version": "npm run prestart && docusaurus-version",
     "rename-version": "docusaurus-rename-version"
   },
   "devDependencies": {