docs(sprint-01): add comprehensive expert feedback integration and rework process

- Expand 'If Changes Needed' section with detailed rework guidance
- Add REWORK_TASKS.md template for tracking issues by severity
- Add REWORK_PLAN.md template for implementation planning
- Add RE_REVIEW_REQUEST.md template for focused re-reviews
- Add DEFERRED_ITEMS.md template for managing deferrals
- Include severity matrix (Critical/Major/Minor)
- Add step-by-step fix implementation process
- Document lessons learned integration
- Add re-review sign-off process
- Include Sprint 01 completion checklist

Author: KevenWMarkham