Adding examples of cross validation techniques used in ML and DL with respect to scikit-optimize, hyperOptuna etc. libraries

[akashrai2003]

Creating projects based on MNIST or other standard datasets to show the real-life importance of cross-validation and optimization techniques rather than just using and fitting the models directly onto the datasets.

• Bayesian Optimization techniques including SMAC, TPE and Gaussian Processes etc.

[Niketkumardheeryan]

go for it