`CanRCM4-EWEMBI-MBCn` to be added to the tool

The files are being downloaded by Camille Gauthier.

The specifics are unknown at this point, but this issue will be updated.

The temporary path to the data is the following:

```console
ARC: /work/comphyd_lab/users/camille.gautier/hay-river/futur_scenarios
```

Copying Camille @camille-gautier