feat: enhance API route naming conventions and structure

- Added comprehensive guidelines for API route naming and structure in `ROUTE_NAMING_BEST_PRACTICES.md`.
- Updated `ARCHITECHTURE.md` to reference the new best practices document.
- Refactored course-related routes to follow new naming conventions, including changes to endpoint paths and validation schemas.
- Removed the deprecated course clone route and integrated cloning functionality directly into the course routes.
- Adjusted various API methods to ensure consistent usage of HTTP methods and parameter structures across the application.

packages/utils/src/validation/README.md

@@ -160,7 +160,7 @@ validations.{fieldName}.{errorCode}
 
 ```typescript
 // packages/utils/src/validation/lesson/lesson.ts
-import { z } from 'zod';
+import * as z from 'zod';
 
 /**
  * Lesson Create Validation Schema