Resolved configuration for the action-select composites - the inline
create-action workflow shared by CngxActionSelect and
CngxActionMultiSelect. Holds the focus-trap behaviour, action-button
position, popover placement, ARIA label, and create / close timing.
Provide it through one of two entry points, never the token directly:
provideActionSelectConfig(...) returns EnvironmentProviders - app bootstrap or a route.
provideActionSelectConfigAt(...) returns Provider[] - a component's providers / viewProviders.
Compose from the with* features (withActionAriaLabel, withActionPosition,
withActionPopoverPlacement). Resolution is nearest-wins: a nested provider
replaces an ancestor config for its subtree, it does not deep-merge.