feat: make product query configuration init public

[Harry-KNIGHT]

What

• Turn ProductQueryConfiguration init public & no more internal.

Fixes bug(s)

• ProductQueryConfiguration' initializer is inaccessible due to 'internal' protection level

Part of

[Copilot]

Pull Request Overview

This PR makes the ProductQueryConfiguration initializer and related types publicly accessible by changing their access control from internal to public. The changes enable external consumers to create ProductQueryConfiguration instances and access related types that were previously restricted to internal use.

• Change ProductQueryConfiguration.init from internal to public
• Make ProductResponse properties, methods, and enum publicly accessible
• Make ProductField enum public

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
Sources/Model/OFF/ProductConfiguration.swift	Makes the ProductQueryConfiguration initializer public
Sources/Model/OFF/ProductResponse.swift	Makes ProductResponse properties, methods, constants, and CodingKeys enum public
Sources/Model/OFF/ProductField.swift	Makes ProductField enum public

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[teolemon]

@Harry-KNIGHT I'm no swift expert, so I will approve