Add ability to modify the global tags section

[AdrianRaFo]

No description provided.

[alejandrohdezma]

👋🏼 That's a great addition, but, what if instead adding an ad-hoc method just for tags, we add a method for allowing customizing the whole OpenAPI object? Something like...

/** Method that can be used to modify the `OpenAPI` object before transforming it to YAML */
def tapirGoldenOpenAPIModifier(openApi: OpenAPI): OpenAPI = openApi

And then use it like:

private def yaml: String = {
  val openAPI = OpenAPIDocsInterpreter(tapirGoldenOpenAPIOptions).toOpenAPI(endpoints, tapirGoldenOpenAPIInfo)

  val yamlString = tapirGoldenOpenAPIModifier(openAPI).toYaml

  tapirGoldenOpenAPIHeader match {
    case ""     => yamlString
    case header => s"$header\n\n$yamlString"
  }
}

[alejandrohdezma]

This change has been included in 0.3.0 version.