Design meeting: Ergonomic ref-counting

[nikomatsakis]

Summary

Review feedback from the RFC and a proposal for overall direction

About this issue

This issue corresponds to a lang-team design meeting proposal. It corresponds to a possible topic of discussion that may be scheduled for deeper discussion during one of our design meetings.

[traviscross]

In the planning meeting today, we scheduled this for the design meeting on 2025-08-27.