feat: add import service API path for task 5

[Javlon999]

What was done?

• Added Import Service API path to apiPaths.ts
• Frontend can now request presigned URLs from the Import Service
• Enables CSV file upload to S3 via the Import Service

Import Service API

• GET presigned URL: https://rqsp3j0ncj.execute-api.ap-southeast-2.amazonaws.com/prod/import?name=products.csv

Product Service API

• GET all products: https://3t3nnkwaeb.execute-api.ap-southeast-2.amazonaws.com/prod/products

Backend PR

• Task 5: Import Service with S3 integration Javlon999/shop-backend#4

How it works

1. User selects a CSV file in the frontend
2. Frontend calls /import?name=filename.csv to get a presigned URL
3. Frontend uploads the file directly to S3 using the presigned URL
4. S3 triggers the importFileParser Lambda to process the file

Product CSV Schema

title,description,price,count
Test Product,Test Description,100,5
Another Product,Another Description,200,10