refactor(query-core): change QueryMeta and MutationMeta to an interface

[DaleWebb]

Changes the QueryMeta and MutationMeta types to interfaces, so that they can have their shapes overridden in the implementing codebase for safer typing and autocompletion.

interface Meta {
  persist?: boolean;
}

declare module '@tanstack/react-query' {
  interface QueryMeta extends Meta {}
}

useQuery(queryKey, {
  meta: {
    persist: false,
  },
});

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[TkDodo]

TypeScript refers to these as index types in the docs:

https://www.typescriptlang.org/docs/handbook/2/objects.html#index-signatures

this is just a stylistic change though

[umangjun92]

Can this be merged to version v3 as well