Inject swagger (Open API)

[OlegKoshelev]

Problem:

Order to make requests we use postman, but it will be more convenient to use swagger.
To add swagger use Tapir library (https://tapir.softwaremill.com/en/latest/).

Task:

1. Rewrite RcEventsAPI with using Tapir
   a. Add endpoints
   b. Add routes with using endpoints (from point "a")

2. Make Open API with swagger routes ( use endpoints from point 1)

3. Compose routes from points 1 and 3 and add it to Server