Documentation updates:
- Update README.md title and all references
- Update PROJECT_GUIDELINES.md title and guidelines
- Update all documentation files in docs/ directory
- Update device setup guides (Kobo, KOReader)
- Update API and architecture documentation
- Update completion summaries and progress reports
This is part 5 of the project rename to Bookhoard.
- Add comprehensive implementation plan for universal sync system
- Update README with API reference and device setup guides
- Add KOBO_SETUP.md device configuration guide
john-okeefe