[REQ] Update the Vert.x Web codegen to Vert.x 4
Created by: slinkydeveloper
Is your feature request related to a problem? Please describe.
Vert.x 4 includes a brand new support for OpenAPI, while this project supports only Vert.x 3
Describe the solution you'd like
Migrate the existing vertx web codegen to vert.x 4
Additional context
Should this live under a new codegen copy pasted from the previous one and migrated? Or should I just migrate the existing one?