Enhancement: Add "Trigger Now" gutter icon for Quartz Jobs

Please consider adding a "Trigger Now" functionality when a Grails Quartz Job is detected.
This would allow to quickly execute jobs during development without having to use workarounds to trigger an immediate run.

A similar feature is already implemented in Spring for [Scheduled Tasks](https://www.jetbrains.com/help/idea/scheduled-tasks.html) and looks like this:

A similar icon could be added on the identified Quartz Job class name line like this:

No files or tests are named. Start by tracing the existing Quartz Job detection and the identified job-class line in the IntelliJ plugin; done means a visible “Trigger Now” gutter action appears for detected jobs and can execute them during development.

Written by the indexing model from the issue text.