onZoomChange / Persist zoom-level in tauri-plugin-window-state

### Describe the problem

Basically what the title says. I tried implementing a zoom state persistence with my own config, but as there is not way to listen to zoom change events, there is a high-chance that users would not see their zoom preferences restored when starting the app after changing the zoom level via `ctrl +`, `ctrl -` or `ctrl wheel`.

### Describe the solution you'd like

Either:

- A way to subscribe to zoom change events in Tauri so I can implement the persistence myself
- Have this built-in in `tauri-plugin-window-state` (this is a cherry on top, but just the first solution would be great).

### Alternatives considered

_No response_

### Additional context

_No response_