Include an option to immediately submit OpenAI requests instead of scheduling them

Describe the feature you'd like to request

For requests sent to OpenAI's servers, the nextcloud assistant waits until cron is ran. This is understandable for larger scale servers. But isn't as useful on smaller servers where nowhere near as many requests will be made. The nextcloud assistant should have an administration option to immediately send a request instead of waiting around for cron to run.

Describe the solution you'd like

There should be an option in the assistant settings to make it so that requests to OpenAI are immediately sent to their servers instead. As opposed to scheduling them.

Describe alternatives you've considered

There is technically the ChatGPT extension that can be used from the smart picker. But often, I forget it's there, and I like having a button that I can click on to process editing.

No files, tests, or entry points are named in the issue. Start by locating the assistant administration settings and the current cron-based OpenAI request scheduling; done means an administrator can choose immediate submission and requests follow that choice instead of waiting for cron.