[feature request] Serialize current zoom and position in workflows

I see several benefits to this, it could maybe be optional like a setting but in no particular order a few use cases:

- when developing frontend extensions/nodes, we often have to reload the page which recenter the graph, this isn't always convenient.
- sharing large workflows and either be able to "present" it by zomming out , or zoomed in and positionned at the workflow entry points, like the inputs.

I see something that might even just be a litegraph setting, but store the graph zoom, x and y in the json worklows export basically (and read them upon load)