First stable release

This release introduces the core functionality for the E-Commerce Inventory API, including user authentication, product and category management, and search capabilities.

Features:

1. User Authentication: Register, login, and JWT-based authorization.
2. Product Management: Create, list (with filters & pagination), get, update, and delete products.
3. Category Management: Create, list, get, update, and delete categories with product count checks.
4. Search: Search products by name or description.
5. Create Product with image upload