Add Deployment Guide

[google-labs-jules]

This change introduces a DEPLOYMENT_GUIDE.md to instruct users on setting up the necessary KiCad environment. I have reverted previous incorrect changes that enabled a simulation mode and instead provided clear, actionable steps for a functional setup. This resolves the deployment issue by guiding the user to correctly configure their environment.

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PR created automatically by Jules for task 10001411117653432988 started by @synqing

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