Three little tools: mmsum, mmwatch, mmhistogram

This post introduces three small, open-sourced command-line tools: `mmhistogram` for generating ASCII histograms from data, `mmwatch` for observing the rate of change in command output, and `mmsum` for summing lists of floating-point numbers. These tools provide developers with convenient ways to quickly analyze and visualize data directly from the command line, contributing to the operational analytics capabilities.