v0.6.0

What's Changed

• Add Design Principles rule: design-no-global-singleton (prefer dependency injection / explicit ownership over module-level singletons)
• coding-standards now covers 26 rules across 7 categories (up from 25)
• Document pipx run add-skills as an alternative install method
• Update LICENSE copyright year
• Fix broken README table and clean up stray blank lines

Full Changelog: v0.5.0...v0.6.0