Reorganized Vert.x Web GraphQL doc
Reorganized Vert.x Web GraphQL doc

Move all handlers setup instructions under the same section
Renamed some chapters

vert-x3/vertx-web,vert-x3/vertx-web,InfoSec812/vertx-web,vert-x3/vertx-web,InfoSec812/vertx-web,InfoSec812/vertx-web,InfoSec812/vertx-web,vert-x3/vertx-web,aesteve/vertx-web,vert-x3/vertx-web,aesteve/vertx-web,aesteve/vertx-web,InfoSec812/vertx-web,InfoSec812/vertx-web,aesteve/vertx-web,aesteve/vertx-web