Add .claude-plugin/plugin.json to all 67 remaining plugins and simplify
marketplace.json entries by removing redundant fields (keywords, strict,
commands, agents, skills, repository) that are now auto-discovered.
Bump marketplace version to 1.5.0.
Fantastic work, Ryan! You delivered an exceptional shell-scripting plugin with comprehensive coverage of defensive programming, static analysis, and testing patterns. Your responsiveness to feedback and commitment to quality are exactly what we value in this project. Thanks for the great contribution! 🎉