refactor(devtools): extract tracking logic from DevtoolsSyncer
#122
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This is a pre-requisite for `withGlitchTracking()` feature. `DefaultTracker` will track the states via an `effect`, but it is possible to override it with another tracker implementation per SignalStore. At the moment, there is just one implementation, but `withGlitchTracking()` will follow in the next commit.
It tracks all state changes of the State, including intermediary updates
that are typically suppressed by Angular's glitch-free mechanism.
This feature is especially useful for debugging.
Example:
```typescript
const Store = signalStore(
{ providedIn: 'root' },
withState({ count: 0 }),
withDevtools('counter', withGlitchTracking()),
withMethods((store) => ({
increase: () =>
patchState(store, (value) => ({ count: value.count + 1 }))
}))
);
// would show up in the DevTools with value 0
const store = inject(Store);
store.increase(); // would show up in the DevTools with value 1
store.increase(); // would show up in the DevTools with value 2
store.increase(); // would show up in the DevTools with value 3
```
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This is a pre-requisite for
withGlitchTracking()feature.DefaultTrackerwill track the states via aneffect, but it is possible to override it with another tracker implementation per SignalStore.At the moment, there is just one implementation, but
withGlitchTracking()will follow in the next commit.