docs: add storybook for CardField components

[sebastianfdz]

Add PayPalCardFields Components Story in Storybook

This PR includes the following Storybook items:

• PayPalCardFieldsForm
• Individual Components
  • PayPalNameField
  • PayPalNumberField
  • PayPalExpiryField
  • PayPalCVVField
• PayPalCardFieldsProvider
• usePayPalCardFields

We include the following for each Story:

• High level description of each individual component
• Example code for merchants to utilize
• Code sandbox running example code
• Props needed for the component
• The relevant types for the component

Note: Client-id being used in example code is not test since test is not set up for ACDC.

Implemented code

Source code

Props and types

[mchoun]

We should make sure the code sample can be copy and pasted by the developer.

[elizabethmv]

Looking good so far! There is some clean up needed on the warnings and I added some changes for a few areas to fix on naming.

I think one other main area that needs addressing is to remove clientToken any of these new stories in the PR. It shouldn't be needed for card fields- and could clean up/delete a lot of code

[wallportillo]

@sebastianfdz and @mchoun could the positioning of the PayPalCardFields component be placed at the top in front of PayPalHostedFields? I would like Card Fields to be found first.

[sebastianfdz]

@sebastianfdz and @mchoun could the positioning of the PayPalCardFields component be placed at the top in front of PayPalHostedFields? I would like Card Fields to be found first.

Great call!