[Feature Request]: Adding generation task to the queue

### Is there an existing issue for this?

- [X] I have searched the existing issues and checked the recent builds/commits

### What would your feature do ?

When a task is sent for generation, it will be automatically added to the queue list, which is sequentially processed by the SD server. Such a function is well realized in Comfi.

### Proposed workflow

1. Ctrl+Enter > Adds the generation task to the queue
2. The [Clear Queue] button > will cancel the generation by the server and clear the queue list

That's all it takes!

### Additional information

_No response_

Start by tracing the Ctrl+Enter generation action and the Clear Queue button through the UI and SD server workflow. Review how generation requests are currently sent and how cancellation is handled. Done means Ctrl+Enter adds tasks to a sequential queue, while Clear Queue cancels server generation and removes queued tasks.

Written by the indexing model from the issue text.