[Woo POS] M2: Update cart's design

[backwardstruck]

M2 design post:
https://woomobilep2.wordpress.com/2024/07/05/pos-poc-m2-designs-i1/

M2 design:

https://www.figma.com/design/TfaZ4LUkEwEGrxfnEFzvJj/WooCommerce-POS?node-id=2289-67728&t=mAN6TqyzjnFQlHjB-0

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.

[kidinov]

@backwardstruck I hope you don't mind - I split this into 2 tickets, as this maybe too much work

#12008

[backwardstruck]

#12008

I agree it's usually better to break the work into smaller pieces.