v0.6.0

What's Changed

• Added orwells-rules writing-style skill based on George Orwell's 1946 essay Politics and the English Language.
• Bumps version to 0.6.0 across manifests (plugin.json, .claude-plugin/plugin.json, .claude-plugin/marketplace.json, .codex-plugin/plugin.json, gemini-extension.json, package.json, pyproject.toml).
• 16 skills valid (9 measurable frameworks + 7 character voices).