Open selection as a multiscene file in Vol-E

## Use Case

Extension of #252. Add an option to open the current selected cells in the gallery in Vol-E as a multiscene image.

## Solution

- [ ] Add a button in the gallery view in CFE to open all current selections in Vol-E.
- [ ] When clicked, the button should open Vol-E in a new tab with the images included as a multiscene file.
- [ ] Stretch: Also include all metadata from the files.

## Alternatives

Consider adding this for selections too. See BFF + Vol-E linkage.