Add support for generating confusion matrices

[900miles]

Description

Confusion matrices are a very useful visualization tool that senselab should support in its plotting functions

Example:

Tasks

• [ ] Add confusion matrix function to plotting utils
• [ ] Add tests

Freeform Notes

No response

[900miles]

Already implemented in sci-kit (https://scikit-learn.org/stable/modules/generated/sklearn.metrics.confusion_matrix.html), though should probably combine this with matplotlib to produce a nice picture. Perhaps a function parameter to return either a nice plot or the matrix itself, or both?

[900miles]

Actually nvm this is implemented exactly as intended here: https://scikit-learn.org/stable/modules/generated/sklearn.metrics.ConfusionMatrixDisplay.html#sklearn.metrics.ConfusionMatrixDisplay.from_predictions

[900miles]

From @satra: "things like metrics and confusion matrices should just be used from scikit-learn. no real need to incorporate them at this point."

I'll close this for now. If we decide this would be good to implement in the future we can reopen the issue or create a new one.