XCFrameworkInfoPlist support more platforms

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To resolve tuist/tuist#6133, we need to be aware of the platform of an XCFramework. Tuist uses XcodeGraph to detect it.

However, the XCFrameworkInfoPlist currently defined the platform, but this enum is complete, and not being used yet.

    /// It represents the library's platform.
    public enum Platform: String, Hashable, Codable {
        case ios
    }