* Add Java DSL for GraphQL
* GraphQl.outboundChannelAdapter() -> outboundGateway()
* * Add `private` ctor to `GraphQl`
* * Just `GraphQl.gateway()` - there is not going to be any other components
to handle GraphQL operations.
Also, the `outbound` in the name might confuse, where we, essentially, query a GraphQL data
* Fix typo in the doc
Co-authored-by: Gary Russell <grussell@vmware.com>
Co-authored-by: Gary Russell <grussell@vmware.com>