docs: nVersionCount support for KMP design doc

[duffney]

Description

Design document for nVersionCount support for the KMP.

Type of change

• [x] documentation

Post Merge Requirements

• [ ] MAINTAINERS: manually trigger the "Publish Package" workflow after merging any PR that indicates Helm Chart Change

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark: