Neural network has a predict() method

Although it currently outputs a random value since it can’t be trained yet, it is still a good milestone.

I tested a network with 3 input neurons, 4 output neurons, and 2 hidden layers containing 4 neurons each. I ran the predictions 1 billion times based on random inputs. Here are the results:

Total time: 167380.87 ms
Speed per prediction: 0.000167 ms
Per second: 5,974,399 predictions per second