Study: Comparison between diagnostics in this package and in the Macke Lab SBI package

[bnord]

We will compare the diagnostics from the SBI (https://sbi.readthedocs.io/en/latest/) from Macke Lab and the diagnostics in DeepDiagnostics.

We need to do this comparison carefully for the following reasons:

1. to make sure we understand the difference when we write the paper and discuss our package with people
2. to highlight items that we should work on more specifically -- e.g., making the code mathematically transparent where it's not in other software
3. ...