[BUG] Qty input on PDP

[kkumarcodes]

Is your feature request related to a problem? Please describe. Users can type nonnumber values in qty picker input on PDP. When validation is triggered it shows a message with regex. Many users can't really understand regex.

Describe the solution you'd like Qty input should have the type of number and only accept positive numbers. I would suggest a better validation message that would improve UX.