[Feature Request] Whipper does not detect multi-disc releases

[C600K3D]

Current behavior:

When ripping a multi-disc album (for example,
Artist: Metallica and San Francisco Symphony
Title: S&M2 (Disc 2 of 3)),
Whipper treats the disc as an independent album rather than recognizing it as part of the same release.
This leads to whipper abandoning the rip and the user needs to move/rename the folder before ripping the next disc of the same release.

Requested behavior:

• Identify multi-disc releases by checking the album’s metadata from MusicBrainz (e.g., release group ID, disc number, total disc count).

• Compare the metadata of the current rip with existing rips to determine if it belongs to the same multi-disc set.

• Handle duplicates or disc associations intelligently, such as:

  • Automatically grouping rips into the same album directory.
  • Ensuring track numbering and metadata reflect disc numbers correctly.

• Alternatively, the user should be prompted on how they would like to proceed

[github-actions]

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