Dimensionality Reduction on Proteins

[hendraet]

Issue description

Currently, dimensionality can only be to samples It would be nice if the user could choose to apply it to the proteins as well so that they can be compared nicely.

Acceptance Criteria

• Dimensionality reduction steps (currently UMAP, t-SNE) have an option to select if sample or protein dimension should be reduced
• The results can be visualized in the scatter plot step
• Written tests