Use import type for type imports

[cshaa]

Attempting to use typedDocumentNode with SvelteKit, or any project that uses the verbatimModuleSyntax option, results in an error:

[plugin:vite:import-analysis] Failed to resolve entry for package "@graphql-typed-document-node/core".
The package may have incorrect main/module/exports specified in its package.json.

Simply adding type to the imports fixes the problem.

[cshaa]

For anybody else facing this issue until this PR gets merged and released, there is a simple walkaround. You can either correct the generated code yourself, or use ts-autofix to do it for you:

// package.json
{
  "scripts": {
    "codegen": "zeus --td https://gitlab.com/api/graphql src/ && ts-autofix --fixes convertToTypeOnlyImport",
  }
}