add product insertion functionality

[moshefortgang]

Added functionality to add a new product with React Hook Form. Integrated toaster notifications for user feedback.

[vercel[bot]]

@moshefortgang is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[leerob]

Thanks for the suggestion! While we're not going to add this here, it would be great for your fork 😄