Wiki plugins

I would like to show the schedule information of work items and trackers in a Gantt chart.

According to the user guide, GanttChart, DynamicGantt, and CBQL are supported in a widget in a wiki page.

However, to build my widget, the following three points can't be found in user guide :

    #1. List of Wiki plugins available in Codebeamer 3.0.0

    #2. How to display items extracted via CBQL in a Gantt chart

    #3. How to implement a Dynamic Gantt Chart

       (・Is it a Wiki plugin?    ・Is it a widget?    ・Is it exclusive to the Dashboard? )

So please can you tell the information in above.

My version: Codebeamer 3.0.0

I have planned to place the gantt chart in the following location:

    #1. Description field in a work item (Wiki text)

    #2. A widget in a Wiki page