Implement metrics feature: Add new subcommand for analyzing critical log metrics

This MR introduces a new subcommand called "metrics".

This allows users to analyze and display critical metrics from log files.

Useful for identifying problem requests that cause performance issues.

It provides options to specify the number of top values to display, a threshold multiplier for considering a value as critical, and a minimum duration for duration-based metrics.

The use case for this feature is to easily identify issues such as High volume of Redis calls.