feat: paypal sdk v6

[Michel (cyl3x)]

fixes #257

ToDo list

• V6 Toggle
• PayPal
• PayLater
• ACDC - missing card holder name
• Venmo
• Google pay
• Apple pay
• Express buttons
• Funding eligibility
• Installment banner - check cart page, ratio supported?
• Sepa - supported?
• APMs (optional)
• Vaulting for PayPal, Pay later, Venmo
• Preload sdk + message script via script tag
• deprecate old scripts + script data properties
• tsc + eslint storefront pipeline
• Error handling needs script class
• Page type implementation
• Style only done via HTML
• Button language
• Multi-Button support (show paylater / alternative payment methods) SBP "Show PayLater"
• PayLater message banner below cart table needs design
• Test production
• venmo button styling check
• Introduce server-side customer eligibility check
• Optimistically show express buttons based on the server-side eligibility check
• Load SDK faster
• Fetch client token dynamically on cached sites

[Max Stegmeyer (mstegmeyer)]

LGTM (you have conflicts). You will get an approve, once it's complete and out of draft 😉