[WIP] Fix FLAC VorbisComment being used as tag incorrectly

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>FLAC set the VorbisComment as tag incorrectly</issue_title>
<issue_description>

TagLibSharp2/src/TagLibSharp2/Core/MediaFile.cs

Line 389 in 527b7fb

return MediaFileResult.Success (result.File!, result.File!.VorbisComment, MediaFormat.Flac);

VorbisComment is being used as tag and cause the issue.
For example, for flac file, property Pictures contains 1 element in the MediaFileResult.File but not in the MediaFileResult.Tag</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes FLAC set the VorbisComment as tag incorrectly #6

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