Fix Organization Inconsistencies

[lanceu0128]

The app has several organizational inconsistencies after the initial hackathon work:

• mixed structures (src/cookbook_components, src/scheduling_components, src/components/Scheduler, plus page-specific bits under src/pages/cookbook). We should mostly separate categories of work in the top-level, and divide into cookbook and scheduler afterward.
• inconsistent snake_case folder names vs camelCase files, and shared code split between src/shared/* and top-level feature dirs
• services mix base src/services/service.ts with specific service files.

These should be fixed!