Update project documentation to reflect the completion of Phase 0 and Phase 1, and the commencement of Phase 2. This includes archiving obsolete documents, updating the README with a new architectural overview, and refining the project checklist and status reports.
- Archive obsolete PRD and Roadmap documents
- Update `IFNEX_Phase0_Checklist.md` with completed tasks and Phase 2 roadmap
- Update `STATUS.md` with recent development progress for August 2026
- Refactor `04_Laravel/README.md` to include detailed technical specifications and architecture diagrams
- Update root `README.md` with updated versioning and system architecture visualization
- Refine `PriceCalculatorServiceTest.php` to align with updated service output structures
