chore: refactor project structure and clean up unused components

- Updated `TODO.md` to reflect new testing tasks and final structure expectations.
- Simplified TypeScript path mappings in `tsconfig.json` for better clarity.
- Revised business logic separation rules in `.cursor/rules` to align with new directory structure.
- Deleted unused client components and services to streamline the codebase.
- Adjusted import paths in scripts to match the new structure.

scripts/reset-database.ts

@@ -1,4 +1,4 @@
-import { prisma } from '../services/database';
+import { prisma } from '../src/services/database';
 
 /**
  * Script pour reset la base de données et supprimer les anciennes données