Nm Imbue Justify

Initial release of the "justify" skill for auditing software changes for additive bias and compliance with the Iron Law. - Audits code changes for additive bias, scoring several signals such as line ratio, new files, test logic changes, new abstractions, and workaround patterns. - Checks for Iron Law compliance by verifying that test logic was only changed if requirements changed. - Provides a step-by-step audit protocol with recommended tooling and scoring methodology. - Guides users through minimal intervention analysis and invariant impact assessment for each change. - Encourages generation of a structured Justification Report before merging changes.