Added OpenAPI Generator rawBodyMode and object field improved generation handling - #714

  @HttpRoute(
      method = "POST",
      path = "/store/raw-object"
  )
  DefaultApiResponses.RawObjectApiResponse rawObject(@Header HttpHeaders additionalHeaders, byte[] body); // or HttpBodyOutput body

 @Generated("io.koraframework.openapi.generator.javagen.ApiResponseGenerator")
  sealed interface RawObjectApiResponse {
    @Generated("io.koraframework.openapi.generator.javagen.ApiResponseGenerator")
    non-sealed interface RawObjectObjectApiResponse extends RawObjectApiResponse {
      byte[] content(); // or HttpBodyInput content

      int statusCode();
    }

    /**
     * Raw object response (status code 200)
     */
    @Generated("io.koraframework.openapi.generator.javagen.ApiResponseGenerator")
    record RawObject200ApiResponse(byte[] content) implements RawObjectObjectApiResponse {
      @Override
      public int statusCode() {
        return 200;
      }
    }

    /**
     * Raw object server error (status code 500)
     */
    @Generated("io.koraframework.openapi.generator.javagen.ApiResponseGenerator")
    record RawObject500ApiResponse(byte[] content) implements RawObjectObjectApiResponse {
      @Override
      public int statusCode() {
        return 500;
      }
    }
  }

  @HttpRoute(
      method = "POST",
      path = "/store/raw-object"
  )
  DefaultApiResponses.RawObjectApiResponse rawObject(HttpHeaders _headers, byte[] body) throws Exception; // or HttpBodyInput body

  @Generated("io.koraframework.openapi.generator.javagen.ApiResponseGenerator")
  sealed interface RawObjectApiResponse {
    /**
     * Raw object response (status code 200)
     */
    @Generated("io.koraframework.openapi.generator.javagen.ApiResponseGenerator")
    record RawObject200ApiResponse(byte[] content) implements RawObjectApiResponse { // or HttpBodyOutput content
    }

    /**
     * Raw object server error (status code 500)
     */
    @Generated("io.koraframework.openapi.generator.javagen.ApiResponseGenerator")
    record RawObject500ApiResponse(byte[] content) implements RawObjectApiResponse { // or HttpBodyOutput content
    }
  }