Support adding/removing parameters

[Bronstrom]

Description

As a user of the OSCAL Viewer/Editor, I would like to be able to add/remove the elements in params.

Acceptance Criteria

• new params elements are able to be added
• params elements can be removed

Proposed Solution

No response

Additional Notes

No response

Implementation

• I can (or plan to) submit a pull request to implement this
• Implementing this may result in a breaking change