feat: add notification when quota exceeded

[lukasdotcom]

Discussed to be a background job, but I think it would probably be better to notify when the quota is exceeded as this is already checked by default. This also means that the assistant error has more information when the quota is exceeded in a separate notification.
Resolves: #200

[Copilot]

Pull Request Overview

This PR adds notification functionality to alert users when their OpenAI API quota is exceeded. The notification system provides specific messaging for different quota types (text, image, transcription, speech) and includes a link to the user's AI settings page.

• Implements a notification system for quota exceeded scenarios
• Creates a new Notifier class to handle notification preparation and display
• Modifies the quota checking logic to trigger notifications when limits are reached

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
lib/Service/OpenAiAPIService.php	Modified quota checking to create and send notifications when quota is exceeded
lib/Notification/Notifier.php	New notifier class that formats and prepares quota exceeded notifications
lib/AppInfo/Application.php	Registered the new notifier service in the application

[kyteinsky]

nice, this approach is indeed better.

[kyteinsky]

looks good!

would you mind organizing your commits into two parts? The second one becuase it affects more than quota related changes.
"feat: add notification when quota exceeded" and "chore: use ocp server get"
or you can merge the whole commit as one using the squash button here in github.
the incremental changes in different commits is nice for PRs but when looking back, you see individual commits and comments in code.