#25970 Add to bag Drop down (hover) feature

- Create event listener change on the quantity selection dropdown 
- Create a function that will update the selected item using /cart/change.js endpoint
- Update the mini cart contents if the ajax call is a success
- Add a event listener click on the add to cart buttons on each product cards
- Use /cart/add.js ajax api then update the minicart content when the request is a success