We have a plugin “Scriptrunner” and we would like to add a new filter to the list. Сould you tell which web item to use to add a filter.
You would use this API presumably: https://docs.atlassian.com/software/jira/docs/api/8.10.0/com/atlassian/jira/bc/filter/ProjectSearchRequestService.html
Probably you are looking for this documentation
If you need to add a new option to the list, I think you would need to create a WebItem and associated with the location you would like to see.
Honesty I don’t think here is the best forum to get this information and I recommend you to either open a ticket to their support or raise a ticket to https://community.atlassian.com/ tagging Scritprunner