Enhancement: Add Category Models and Product Index to Support Product Filtering

[zablon-oigo]

1. Category Models:

   • Introduce a new model for product categories, allowing users to categorize products.
   • Implement a one-to-many relationship between products and categories.

2. Product Index:

   • Add a unique product index to the products model to facilitate efficient querying and referencing of products.
   • This index could be used for quick lookups and improved performance when dealing with a large number of products.

3. Timestamp in Products Model:

   • Include a timestamp field in the products model to track the creation or last modification time of each product.
   • This timestamp can be useful for displaying the most recently added or updated products and for maintaining a history of changes.

Benefits:

• Enhanced user experience with the ability to filter products by category.
• Improved performance through the introduction of a product index.
• Better management and tracking of product changes with the addition of timestamps.