Jira / Confluence import

### Description of the issue

Do you plan to add an importer module for jira and confluence ?

### Your environment

* Next release

### Expected behaviour

Import projets and issues from jira with user groups and permissions. Import spaces and documents from confluence with user groups and permissions

_{Huly®: UBERF-9047}

The issue names no files, tests, or entry points. First locate any existing importer modules and clarify the Jira and Confluence data, group, and permission scope; done would mean an agreed implementation plan and verified imports for the requested entities.

Written by the indexing model from the issue text.