Add validation strategies

[JStumpp]

e.g. https://medium.com/@srinivaspadmanabhuni/10-tests-for-your-ai-ml-dl-model-40168a41e9ad

[maitreepatel1110]

Hi @JStumpp,
I’m interested in working on this issue and would love to contribute by adding the necessary validation strategies for the AI/ML/DL models as suggested in the article you referenced.

I have experience with developing and implementing test strategies for machine learning models, including cross-validation, stratified sampling, and performance metric evaluation.
Could you please assign me this task. Looking forward to contributing.