[NgRx/signals]feat:withPolling / withAutoRefresh

[mzkmnk]

Description
Add a mechanism to periodically refresh the store’s data via scheduled polling or auto-refresh. This is useful for live dashboards, real-time analytics, or any component that needs to stay in sync with external data without manual triggers.

Why This Matters

• Automatic Updates: Reduces the need for users to manually refresh data.
• Improved UX: Ensures data displayed in the app is current, especially in scenarios where real-time or near-real-time info is critical.

Possible Approaches

• Provide a configuration option like pollInterval that, when set, triggers an effect or method to fetch and update state at regular intervals.
• Allow customizing the polling strategy (e.g., exponential backoff, manual pause/resume).
• Integrate seamlessly with Angular’s Signals, so UI automatically reflects the updated state without extra boilerplate.