Enable verbatimModuleSyntax and related eslint rule, fix imports

[moimael]

What changes are you making?

Currently @shopify/checkout-sheet-kit is broken when used in a codebase with verbatimModuleSyntax enabled.

Some type imports were not imported correctly using import type.

This PR aims to fix this.

• fixed the faulty imports
• enable TS verbatimModuleSyntax
• enable the eslint rule to enforce this behaviour

How to test

---

PR Checklist

[!IMPORTANT]

• [ ] I've added tests to support my implementation
• [x] I have read and agree with the Contribution Guidelines.
• [x] I have read and agree with the Code of Conduct.
• [ ] I've updated the README.

---

Checklist for releasing a new version

• [ ] I have bumped the version number in the package.json file.
• [ ] I have added a Changelog entry.

[!TIP] See the Contributing documentation for instructions on how to publish a new version of the library.

[moimael]

I have signed the CLA!

[moimael]

Thanks for this @moimael!

Do you mind separating the type imports from the non-types?

Like this:

import {NativeModules, NativeEventEmitter} from 'react-native';
import type {EmitterSubscription} from 'react-native';
import {ShopifyCheckoutSheetProvider, useShopifyCheckoutSheet} from './context';
import {ColorScheme} from './index.d';
import type {
  CheckoutEvent,
  CheckoutEventCallback,
  Configuration,
  ShopifyCheckoutSheetKit,
} from './index.d';
import type {CheckoutException, CheckoutNativeError} from './errors.d';
import {
  CheckoutErrorCode,
  CheckoutExpiredError,
  CheckoutClientError,
  CheckoutHTTPError,
  ConfigurationError,
  InternalError,
  CheckoutNativeErrorType,
  GenericError,
} from './errors.d';
import type {CheckoutCompletedEvent} from './events.d';
import type {CustomEvent, PixelEvent, StandardEvent} from './pixels.d';

Done!

[moimael]

@markmur Can you approve the CI workflow again? I forced push to be able to sign my commits since it was a requirement in the CI.

[markmur]

This was released as part of 3.0.4. Thanks for contributing!