[REQ] Add externalDocs to @Operation

Is your feature request related to a problem? Please describe.

I'm using the openapi-generator-maven-plugin 6.2.1 and its spring-boot library with springdoc-openapi-ui 1.6.6.
I'm configuring an externalDocs at operation level like below in a openapi specification file v3.0.3:

paths:
  /hello/{name}:
    get:
      description: "Say Hello to somebody"
      externalDocs:
        url: "https://wiki.mycompany.com"
        description: "API Wiki Specification"
      operationId: hello

The url and description are used in the generated javadoc:

    /**
     * GET /hello/{name}
     * Say Hello to somebody
     *
     * @param name The person's name (required)
     * @return The greeting (status code 200)
     * API Wiki Specification
     * @see <a href="https://wiki.mycompany.com"> Documentation</a>
     */
    @Operation(
        operationId = "hello",
        responses = {
            @ApiResponse(responseCode = "200", description = "The greeting", content = {
                @Content(mediaType = "application/json", schema = @Schema(implementation = MessageResource.class))
            })
        }
    )
    @RequestMapping(

Describe the solution you'd like

I would like a @ExternalDocumentation will be generated:

    @Operation(
        operationId = "hello",
        externalDocs = @ExternalDocumentation(
            description = "API Wiki Specification",
            url = "https://wiki.mycompany.com"
        ),
        responses = {
            @ApiResponse(responseCode = "200", description = "The greeting", content = {
                @Content(mediaType = "application/json", schema = @Schema(implementation = MessageResource.class))
            })
        }
    )
    @RequestMapping(

Thus Springdoc could add an external link:

Describe alternatives you've considered

N/A

Additional context

This requirement looks like the issue https://github.com/OpenAPITools/openapi-generator/issues/13994 for the description value of the @Operation.

If you want, I could try to contribute on this feature.

Start with the openapi-generator-maven-plugin's spring-boot generator and the code path that emits the generated @Operation annotation. Compare the existing operation description and generated Javadoc handling with the externalDocs data in the supplied OpenAPI example; done means the annotation includes the requested @ExternalDocumentation values and generation coverage verifies it.