Utilizing the core features of the Vert.x toolkit

[dgarus]

It is common to specialize verticles by functional and technical concerns, such as having one verticle for exposing an HTTP API and another for dealing with a data store. This design also encourages the deployment of several instances of a given verticle for scalability purposes.
So we could implement the following verticles:

• repositories HTTP API;
• data storage;
• administration HTTP API;
• caching subsystem (slices, storage, repo configurations, users and so on);
• access to a metadata database.

Verticles should communicate with each other by the EventBus.

[github-actions]

Issue is stale, CC: @artipie/maintainers