refactor: Switch to schema loaders from `@gql.tada/internal`

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🦋 Changeset detected

Latest commit: 7bdcd4977a6e1409099b14d2e3a2957343b393bc

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ----------------- | ----- | | @0no-co/graphqlsp | Patch |

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[stef7]

(I had reported an issue here, but I will follow the proper process and log it as an issue.)