Parse JSON error response

[AvdLee]

Allowing users to parse the returned error response and catch it:

do {
    print(try await self.provider.request(requestWithError).data)
} catch APIProvider.Error.requestFailure(let statusCode, let errorResponse, _) {
    print("Request failed with statuscode: \(statusCode) and the following errors:")
    errorResponse?.errors?.forEach({ error in
        print("Error code: \(error.code)")
        print("Error title: \(error.title)")
        print("Error detail: \(error.detail)")
    })
} catch {
    print("Something went wrong fetching the apps: \(error.localizedDescription)")
}

This PR also changed how errors are printed:

Request https://api.appstoreconnect.apple.com failed with status code 404. Related response error(s):

The request failed with response code 404 NOT_FOUND

The specified resource does not exist. There is no resource of type 'builds' with id 'app.appId').

[SwiftLeeBot]

Congratulations! 🎉 This was released as part of Release 2.1.0 🚀

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