Create a package for "Klarna Checkout API - clientside events"

[adamsoderstrom]

In attempt to have complete TS coverage in a project, you'd need to type external dependencies.
This PR covers one of these scenarios.

This PR provides a package, containing the type definition of the window._klarnaCheckout function.

The PR is interpreted from the documentation of the Klarna Checkout > In-depth Knowledge > Client-side events.

By consuming this package, you be able to get type definitions on the callbacks from your _klarnaCheckout function:

Before

      // eslint-disable-next-line no-underscore-dangle
      window._klarnaCheckout((api) => {
        api.on({ // `on` does not exist on type `any`
          shipping_option_change: (shippingInfo) => { // Where `shippingInfo` is now of type `any`
          },
        })
      })

After

      // eslint-disable-next-line no-underscore-dangle
      window._klarnaCheckout((api) => {
        api.on({ // exists
          shipping_option_change: (shippingInfo) => { // Where `shippingInfo` is now of type `Klarna.ShippingOptionChangeEvent`
          },
        })
      })

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
centra-types-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 4, 2023 4:23pm
react-centra-checkout-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 4, 2023 4:23pm

[adamsoderstrom]

I wonder if this should be done inside the actual package..? 🤔

[adamsoderstrom]

Would be great if i could get some assistance on publishing + review! 💞
@alexanderflink
@maeertin

[maeertin]

question: Is this still relevant? If so, I guess we'd want to rebase against the new main branch :)

Going through PRs now that we're up and running again with our internal packages.

@adamsoderstrom

[adamsoderstrom]

todo: change to @noaignite/klarna-checkout-types

[adamsoderstrom]

note: This package should not be used in Centra projects. Add that to the README.md

[adamsoderstrom]

todo: Verify that these types are up-do-date.