Update api_service to use WebSockets

### Describe your improvement idea or feature request

The new JobQueue system in CCSync does not directly tell the status of the Job or its response, but uses a WebSocket instead.
Integrate this to the `api_service.dart` using [web sockets library in Flutter](https://pub.dev/packages/web_socket_channel).

### How would you like to see it implemented?

1. The user adds/deletes/marks as completed, deleted just like earlier, but
2. Websocket is used to get the message/status and shows the relevant Snackbar
Similar to [this](https://github.com/CCExtractor/ccsync/pull/71)

### Put here any screenshots or videos (optional)

_No response_

### How can we contact you (optional)

Github/Slack

### Would you like to work on this issue?

None

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