Add category, subcategory pages and products index page

[gkpty]

All of these pages should execute a prisma query to get a list of items. it should display items in a responsive grid.

Create an item component which contains a dive that has:

• an image
• a title (optional)
• a description (optional)
• a price (optional)
• a button (optional)

the item component will be used in each of the pages.