Feature: Add command-driven plot(...) that renders to PNG and inserts into Word#2

Draft

Copilot wants to merge 3 commits intomasterfrom

copilot/fix-a8f95526-fa87-43cb-a967-1562029890cf

Commits on Sep 26, 2025

Initial plan
Copilot
committed
Implement core plot(...) command functionality with Matplotlib and Gnuplot backends

Copilot
and
JohnnyTheCoder1
committed
Complete plot(...) feature with enhanced error handling, tests, and documentation

Copilot
and
JohnnyTheCoder1
committed