fix(hooks): reset session state on SessionStart

docs: rewrite CONTRIBUTING.md in English, remove internal docs

docs: fix stale references in CONTRIBUTING.md and skill-router/README.md

docs: add trilingual READMEs (en/zh-TW/ja) and update INSTALL.md

feat(skill-router): auto-discover skills from SKILL.md on session start

fix: skill-router hook now works with Claude Code hook protocol

docs: add comprehensive documentation and CI pipeline

fix: remove unused copyDirectory function and update documentation URL

docs: update repository URLs to kevintseng/gstack-industrial

Initial commit: gstack-industrial v1.0.0