Add comprehensive Claude Code tooling:
- Agents: docs-researcher, docs-researcher-advanced for documentation research
- Commands: dev:add-e2e-attrs, docs:library, docs:refresh-reference, quality:bundle-analyze, quality:coverage
- Skills: 8 specialized skills including api-change-analyzer, architecture-enforcer, library-scaffolder, and more
Update documentation:
- Comprehensive CLAUDE.md overhaul with library reference system
- Update testing guidelines in docs/guidelines/testing.md
- Update READMEs for checkout, icons, scanner, and scroll-position libraries
Remove outdated checkout-completion-flow-documentation.md
Update .gitignore for Claude Code files
- ✨ **Feature**: Added InViewport directive for element visibility detection
- ✨ **Feature**: Introduced new button for navigation in return details
- 🛠️ **Refactor**: Improved scroll position restoration logic and removed deprecated files
- 📚 **Docs**: Updated README with usage instructions for new directives
Ref: #5034
feat: enhance return search component to handle search callbacks and update query parameters
fix: update return search result component template to use new search method and improve loading states
refactor: streamline return search result component logic and improve state management
feat: implement scroll position restoration in return search feature
feat: introduce filter service enhancements for query settings and synchronization with URL parameters
chore: create utils for scroll position management and viewport detection
fix: update filter service to use new input and query settings types
chore: add tests and configurations for new utils library
ref: #5033
