Port `main.cpp`

[BogdanNitica99]

Need to convert main.cpp to Python. The main function reads the sample dataset and then runs the anomaly detection algorithm on it, reporting the accuracy.

[GabrielMajeri]

List of what the main function is supposed to do:

• Parse the command line arguments, like the original version did. We can use use the standard argparse module for this.
• Read the list of network events from disk, using the read_data function.
• Go through the list of events, adding them to the network graph using the inject_* functions.
  • Every snapshot, compute the PageRank, and then the the anomrank score, and print out any detected anomalies.
• At the end, print some statistics about the predicted results, such as accuracy.