This is popular on google as an index page

Co-authored-by: Jovi De Croock <decroockjovi@gmail.com>

This replaces our expensive method that changes the underlying V8 shape
multiple times with a loop that preserves the identity as much as
possible.

```
⏱   Print kitchen sink document
  1 tests completed.
  2 tests completed.

  HEAD x 9,290 ops/sec ±0.21% x 1.51 KB/op (24 runs sampled)
  BASE x 2,645 ops/sec ±0.18% x 2.18 KB/op (11 runs sampled)
```

---------

Co-authored-by: Benjie <code@benjiegillam.com>

See graphql/graphql.github.io#1951

For someone following the tutorial they may well get as far as running
the server (`node server.js`) and then attempt to visit their new API
and get confused because they're met with an error such as
`{"errors":[{"message":"Missing query"}]}`.

This PR adds some joining text to make it clear this is the expected
outcome, and they must read on to get the GraphiQL IDE set up so that
they can write queries.

…4343)

* removes extra parenthesis from getting started code snippet

Co-authored-by: Yaacov Rydzinski <yaacovCR@gmail.com>

See: [Archived
repo](https://github.com/html5rocks/www.html5rocks.com/blob/master/content/tutorials/es6/promises/en/index.html#L6)
redirected the links.

Issue
The server throws an error because the root variable is not defined. The
correct variable name should be rootValue, which was previously declared
in the code.

Fix
Updated rootValue in the createHandler function to use the correct
variable name.

Changes
Replaced root with rootValue in the GraphQL handler configuration.

…#4363)

In the spec we explicitly disallow `nullable` variables to be passed to
the fields of a oneOf input object. This is present in v17 but seems
missing from v16.

…4366)

This PR add `executionOptions` property to the `ExecutionArgs`.
Currently only one option can be configured, as is the one I need, but I
have built an object so it can easily be extended in the future.

The property allows the configuration of the maximum number of errors
(`maxErrors`) for coercion. This allows the current hardcoded limit
(`50`) to be reduced to a small number to avoid possible DoS attacks.

> Also, it updates the execution docs to reflect this new change. I
think the documentation was outdated since functions were using
positional arguments and now they only accept an object.

No longer updates the docs.

Fixes #4346

Attempting to fix all our failing actions

This refactors the code-first examples to use inline-resolvers rather
than the root-value to show a difference between SDL and code-first.

Follow up to #4378