Add synthetic data

[hermancollin]

We will add synthetic data to the mix. Currently, the goal is to add these 2 new modalities:

• TEM translated to SEM (we already have that)
• TEM translated to BF

This should be enough to investigate if synthetic data has a significant effect on model performance. @Nish228, feel free to keep us updated of your progress in this issue. Also, we can discuss how to share the data or other challenges here.