investigate preservation of grouping and nesting when creating OSCAL comp. def. from original format

[degenaro]

When trestle task cis-xlsx-to-oscal-cd creates an OSCAL Comp. Def. from the xlsx file, the resulting rule sets comprise one sequential list with no grouping or nesting.

It has been suggested as desirable the ability to group and/or nest rule sets in the Comp. Def. rather than having a single list for all, if indeed possible w/o violating OSCAL schema.

[github-actions]

This issue has been automatically marked as stale because it has not had activity within 90 days. It will be automatically closed if no further activity occurs within 30 days.