This PR adds an optional property called `sort` to each framework so that we can change the order returned in the API.
The reason this is necessary is because the order of the original array determines the precedence of framework detection. So we need another way to indicate the order of templates/examples returned from the API.
In particular, we need "Next.js" to be first and "Other" to be last.
I also updated the deprecated `@now/node` usage to `@vercel/node` in the API.
We renamed the GitHub repository from `zeit/now` to `vercel/vercel` so this PR updates all references to the repo URL.
There were also a few remaining references to Now CLI that have been updated to Vercel CLI.
* Add test to frameworks
* Add example for Docusaurus v2
* Add example for ionic-angular
* Update READMEs
* Use existing versions
* Reset yarn.lock
* Add schema validation and add missing Scully.io logo
