Add priority to jobs - APS V4

Things to check first

• I have searched the existing issues and didn't find my feature already requested there

Feature description

Hello,

My suggestion is to add priority to the jobs. Something like:

scheduler.add_job(..., priority=1)

In my opinion, the priority argument could be an integer, where the higher the value, the higher the processing priority of that job.

Use case

Some jobs may require a higher priority than others, so I'm sure this would be useful for a number of use cases.