Consider returning reference type from `AddComponent` API

The AddComponent API currently returns a boolean that indicates if the addition of the component to the document registry succeeded.

It would be nice if the API returned a reference to the item that was just constructed. In an M.A.OpenAPI transformer, I currently need to write:

options.AddOperationTransformer((operation, context, cancellationToken) =>
{
    var schemaService = context.ApplicationServices.GetRequiredKeyedService<IOpenApiSchemaService>(context.DocumentName);
    if (context.Description.RelativePath == "error")
    {
        var errorSchema = schemaService.GetOrCreateSchema(typeof(ProblemDetails));
        context.Document.AddComponent("Error", errorSchema);
        operation.Responses["500"] = new OpenApiResponse
        {
            Description = "Error",
            Content =
            {
                ["application/problem+json"] = new OpenApiMediaType
                {
                    Schema = new OpenApiSchemaReference("Error", context.Document),
                },
            },
        };
    }
    return Task.CompletedTask;
});

but would like to write:

options.AddOperationTransformer((operation, context, cancellationToken) =>
{
    var schemaService = context.ApplicationServices.GetRequiredKeyedService<IOpenApiSchemaService>(context.DocumentName);
    if (context.Description.RelativePath == "error")
    {
        var errorSchema = schemaService.GetOrCreateSchema(typeof(ProblemDetails));
        var insertedSchema = context.Document.AddComponent("Error", errorSchema);
        operation.Responses["500"] = new OpenApiResponse
        {
            Description = "Error",
            Content =
            {
                ["application/problem+json"] = new OpenApiMediaType
                {
                    Schema = insertedSchema,
                },
            },
        };
    }
    return Task.CompletedTask;
});

cc: @baywet I couldn't see if an API that did this existed already and figured I'd add the proposal.

Beginne damit, die Implementierung der AddComponent API und jegliche bestehende Abdeckung für die Registrierung von Dokumentkomponenten zu finden. Vergleiche ihr aktuelles boolesches Ergebnis mit dem Beispiel für AddOperationTransformer und überprüfe anschließend, dass die zurückgegebene Referenz das eingefügte Schema darstellt, während das bestehende Registrierungsverhalten intakt bleibt.