Testing the set state

I would like to be able to drag / drop a file / folder, to convert using nmr-load-save and set the initial state of NMRium.

So after drag / drop we should have a code similar to:

```
read(fileCollection))
.then((state) => {
setNmriumBaseState(state.nmriumState.data);
})
```

This new page could go in the debug menu