Allow all records with 1:1 parent/child relationships to be available on a Gantt, with children grouped under parents

To expand on the original "How should it work"
We need a Gantt chart with the option to display what we want. We would want:

parent initiatives > initiatives > releases (and add features if so desired)

We do not use Epics nor Requirements or To Dos. So having them included in the nesting would be messy

There should be show/hide toggles for all record types to only show relevant data.

I need to be able to create a custom Gantt that meets the following criteria:

• Ability to select one, more or all Workspaces

• Ability to select one, more or all Initiatives

  • Initiative date range displays

• Ability to select one, more or all Releases

  • Releases display collapsed with ability to expand one, more or all

    • Release date range displays

    • Percent complete displays

  • When expanded:

    • Release Milestones display