This PR contains the work done to define the `RateLimit`, `RateLimitRemaining` and the `RateLimitUsed` heades into the Open API specification document, as well as including these headers as part of the response for every existing endpoint declared in the mentioned document.
In addition, the `openapi-generator-config` files was also changed to have a different naming strategy.
Reviewed-on: #7
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>