chore(changeset): related-list add-by-picker + Assigned Users

Author: os-zhuang

.changeset/sdui-related-list-add.md

@@ -0,0 +1,7 @@
+---
+'@object-ui/types': minor
+'@object-ui/plugin-detail': minor
+'@object-ui/app-shell': minor
+---
+
+feat(detail): related-list add-by-picker (generic m2m/junction) + a generic "Assigned Users" management UI on permission sets (assign ai_seat and any role with zero bespoke CRUD; server-side cap errors surface inline).