feat: add all functions in utils and workflow in a notebook

.gitignore

be_image_classification.ipynb

images/knn_accuracy.png

images/mlp_loss.png

images/mlp_loss_tf.png

utils/binary_cross_entropy.py

utils/distance_matrix.py

utils/evaluate_knn.py

utils/forward_pass.py

utils/knn_predict.py

utils/learn_once_cross_entropy.py

utils/learn_once_mse.py

utils/mlp_training.py

utils/one_hot.py

utils/process_image.py

utils/read_cifar.py

utils/sigmoid.py

utils/split_dataset.py