fixing existing product

[fahad-011]

I have fixed the issue of existing product using redux state but there is a problem you need to implement a button or something which will increase or decrease the count of the quantity and according to the quantity the price will be updated. Like others E-commerce website does.

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[fahad-011]

I have updated the following code by adding a reducer logic to remove and add the existing product, To resolve the issue with existing products, I included buttons to increase or decrease the product quantity and update the cost accordingly. Secondly I saw that After adding 4 to 5 products to the cart, I noticed an overflow issue. To address this, I added a scrollbar to ensure smooth display of the products. Lastly, I implemented a dialog box to prompt the user for confirmation when removing an item from the cart.

[fahad-011]

You're welcome! I'm glad you find my contribution amazing. Definitely! I have given the repository a star 🌟. I appreciate your gratitude and I'm always here to assist you with any questions or tasks you have. Let me know if there's anything else I can help you with!

Well I have updated the buttons so now it looks more prettier than before, Hope you will merge this PR and close it soon.