Resolved configuration for CngxReorderableMultiSelect - the keyboard
reorder modifier, drag-handle template, selection-strip freeze-on-commit,
and ARIA label.
Provide it through one of two entry points, never the token directly:
provideReorderableSelectConfig(...) returns EnvironmentProviders - app bootstrap or a route.
provideReorderableSelectConfigAt(...) returns Provider[] - a component's providers / viewProviders.
Compose from the with* features (withReorderKeyboardModifier,
withReorderAriaLabel, withDefaultDragHandle, withReorderStripFreeze).
Resolution is nearest-wins: a nested provider replaces an ancestor config for
its subtree, it does not deep-merge.