v0.3.0: contextual guidance and de-slopify

Changed

• Replaced mandatory sentence and paragraph caps with contextual review signals.
• Removed automatic table requirements and instructions to rewrite every future reply.
• Added tone guidance that preserves meaning, evidence, uncertainty, author voice, and the user's requested format. Progress updates can state the next action without inventing a finding.
• Reframed hook findings as passages to inspect. Detection thresholds and configuration precedence remain compatible.

Added

• Bundled the de-slopify editing skill, its review references, and Codex metadata. The skill now ships under the same version as the plugin.
• Codex installation of the bundled skill, preserving existing personal copies and unrelated hooks.
• Regression coverage for advisory notices and skill installation.

Fixed

• Validate existing Codex hook JSON before replacing installed files.