New tutorials

As discussed in WG call and part of `v16` release plan https://github.com/graphql/graphql-js/issues/2860 we decided to use `tsdoc` to generate basic API docs which I started here https://github.com/graphql/graphql-js/pull/3269. That just solves only couple of many documentation related issues https://github.com/graphql/graphql-js/issues/3150. Currently I just moved over things form `docs` to the new site which has some tutorials which are just okay they are not good enough. This site should have enough resources for someone to learn about GraphQL in JS/TS ecosystem so we need to add more tutorials which range from basic to advanced topics.`graphql-js` can (and is) used for many things and with help of community we should add these new tutorials that cover many different aspects of using `graphql-js`

Review the existing docs and the tutorials on the new site, along with the linked v16 and documentation issues and PR. Identify gaps across basic to advanced graphql-js usage, then consider the work complete when the site has useful tutorials covering the agreed aspects of the JavaScript and TypeScript ecosystem.

Written by the indexing model from the issue text.