feat: configurable queue consummation delay

[kmakris23]

Issue: #409

[jamesmh]

Hey, thanks for the contribution!

I have a few improvements that I think will (a) help the code and (b) enable us to add some tests here.

Also, let's add some user documentation for this! In the file DocsV2/docs/Queuing/README.md you can add the following to the Adjusting Consummation Delay section:

---

Alternatively, you can adjust the consummation delay using AddQueue:

services.AddQueue(queueOptions => {
    // Consume queue every 5 seconds.
    queueOptions.ConsummationDelay = 5;
});

:::tip
QueueOptions will take precedence over your configuration file if both are defined.
:::

---

[kmakris23]

Hi @jamesmh , thanks for your reply. I have updated the code with the required changes. I will be very happy to see it once you have free time.