Added Isolation Forest algorithm for anomaly detection in the messages dataset
Added Isolation Forest algorithm for anomaly detection in the messages dataset

Signed-off-by: Manan Goel <a3cbe98e2cc9cdaf4af3e4e69ac74b9b0bcd8ca7@research.iiit.ac.in>

OSSHealth/ghdata,OSSHealth/ghdata,OSSHealth/ghdata