Feat/crud product APIS added

[ADARSHsri2004]

Description

This pull request introduces the full CRUD (Create, Read, Update, Delete) functionality for the Product entity.

It adds the following API endpoints:

• POST /api/products: Creates a new product.
• GET /api/products: Retrieves a list of all products.
• GET /api/products/{id}: Retrieves a single product by its ID.
• PUT /api/products/{id}: Updates an existing product.
• DELETE /api/products/{id}: Deletes a product by its ID.

This also includes necessary service-layer logic, repository updates, and DTOs (Data Transfer Objects) for handling the product data.

Semver Changes

• Patch (bug fix, no new features)
• Minor (new features, no breaking changes)
• Major (breaking changes)

Issues

• Closes [Feature]: Create CRUD API endpoints for product listings (backend) #18

Checklist

• I have read the Contributing Guidelines.

[04shubham7]

Good Work