Support custom media type

Hi! I have the following code

@GET
@Operation(
        ...
        responses = {
                @ApiResponse(
                        responseCode = "200",
                        content = @Content(
                                examples = {
                                        @ExampleObject(
                                                name = "Some name",
                                                value = "Some Value"
                                        )
                                }
                        ))
        })
@Produces("customMediaType")
public A fetchFont() {
    ... 
}

with this code the following piece of documentation will appear in swagger.json

"200" : {
    "content" : {
        "customMediaType" : {
            "examples" : {
                "Some name" : {
                    "value" :  "Some value"
                }
            }
        }
    }
}

However, when converting json to md using widdershins, this section is not displayed. This is due to the custom media type. Thanks in advance for any effort on this issue!

[yuliya-ivaniukovich]

Hi @MikeRalphson, just created https://github.com/Mermade/widdershins/pull/462 with potential solution

[MikeRalphson]

@KirylBubovich would certainly look at an option to support this. Do you have any time to work up a PR?