Monitor stock levels (Admin)

[syricano]

As a admin I can monitor stock levels so that I can restock items as needed and avoid shortages.

• The admin dashboard includes a stock management section.
• The admin can view a list of all products with their current stock levels.
• The stock levels are updated in real-time as sales occur.
• The admin can filter or sort products by stock level.
• A visual indicator (e.g., color-coded or icons) highlights products with low stock levels.