BridgeSelector and BridgeMultiSelector: syncWithChildren feature added

syncWithChildren for BridgeSelector and BridgeMultiSelector

• New optional config field: syncWithChildren?: boolean added to BridgeSelectorConfig and BridgeMultiSelectorConfig (default false).
• BridgeSelector: when enabled, the selector subscribes to onStateChange() of all child bridges. External activation of a child bridge switches selection to it (select()). External deactivation of the selected bridge deactivates the selector (deactivate()).
• BridgeMultiSelector: when enabled, the selector subscribes to onStateChange() of all child bridges. External activation of a child bridge adds it to the selection (check()). External deactivation of a selected child bridge removes it from the selection (uncheck()).
• Feedback loop prevention: an internal _syncing guard suppresses child state-change notifications while the selector is performing its own activate() / deactivate() / select() / check() / uncheck(), preventing recursive re-entry.
• Cleanup: destroy() unsubscribes from all child state-change subscriptions before destroying owned bridges.
• Backward-compatible: syncWithChildren defaults to false — existing code behaves exactly as before.

Tests

• Added 11 tests for BridgeSelector syncWithChildren (external activation/deactivation, feedback loop prevention on activate/deactivate/select, disabled mode, no-op cases, inactive selector, destroy unsubscribe, onStateChange notification).
• Added 14 tests for BridgeMultiSelector syncWithChildren (external activation/deactivation, feedback loop prevention on activate/deactivate/select/check/uncheck, disabled mode, no-op cases, inactive selector, destroy unsubscribe, onStateChange notification, multiple external activations accumulation).
• Coverage: Maintained 100% test coverage (statements, branches, functions, lines) across all 11 source files. Total tests: 1,982.