Application-root configuration cascade for the tag family. Pass
any combination of withTagDefaults / withTagGroupDefaults /
withTagColors / withTagSlots features in
bootstrapApplication's providers array.
Resolution priority (high → low):
Per-instance Input binding.
provideTagConfigAt(...) in a parent component's
viewProviders.
provideTagConfig(...) at the application root.
Library defaults (CNGX_TAG_DEFAULTS).
The provider deep-merges supplied features with the library
defaults so consumers only declare keys they want to override.