Resolved configuration shared by every select-family composite - panel
presentation, loading / refreshing variants, chip overflow, virtualization,
keyboard open / dismiss triggers, selection-indicator style, and the ARIA /
fallback labels. Composed from the with* features (withPanelWidth,
withVirtualization, withSelectionIndicator, withAriaLabels, ...).
Provide it through one of two entry points, never the token directly:
provideSelectConfig(...) returns EnvironmentProviders - app bootstrap or a route.
provideSelectConfigAt(...) returns Provider[] - a component's providers / viewProviders.
Resolution is nearest-wins: a nested provider replaces an ancestor config for
its subtree, it does not deep-merge. The action-select and reorderable
composites layer their own CNGX_ACTION_SELECT_CONFIG /
CNGX_REORDERABLE_SELECT_CONFIG on top of this base.