v0.1.1 — Windows install, demo, code of conduct

A documentation and usability release. The method itself is unchanged from v0.1.0 — if you are already using Blueprint, nothing in your project needs to move.

Fixed

Windows install instructions. Every command in the quick start was cp and /tmp, so a Windows user could not copy-paste it. Both the README and docs/quickstart.md now carry PowerShell blocks alongside the shell ones, and a documentation test fails if either goes missing.

Added

• A demo. An animated terminal at the top of the README showing the validator reject a task marked complete with no evidence, then pass once the proving command is recorded. Every line is a literal capture of real output, asserted by a test so it cannot drift into fiction.
• CODE_OF_CONDUCT.md — Contributor Covenant 2.1, with reporting routed through GitHub rather than an email address.

Changed

• The README opens with the failure Blueprint prevents rather than a description of what it is.
• validate.py prints paths relative to the working directory when the project is inside it, instead of a full absolute path that wrapped the line on Windows.

Requirements: Python 3.9+ for the optional validator. Nothing else.