Add cartId handling and clarify payment process.

Introduced `cartId` as part of the payment flow to ensure complete payment context, updating associated DTOs, services, and return URLs. Additionally, enhanced documentation with Apple Pay and Google Pay setup details, and clarified webhook and return URL behaviors.

Refactor imports and remove unused mock data.

Updated imports for consistent formatting and cleaned up unused `mockEvent__paymentIntent_requiresAction` mock data from tests. This improves maintainability and reduces unnecessary clutter in the codebase.

Update payment state to 'INITIAL' and simplify conversion logic

If used PENDING update, the sdk.getPaymentAmount is taking as a paid amount, and return a "Cart full paid error"

Update expected state in Stripe event converter test

Merge pull request #1 from stripe/dependabot/npm_and_yarn/enabler/nan…

…oid-3.3.8

Bump nanoid from 3.3.7 to 3.3.8 in /enabler