Support DVD menus

[Igetin]

Expected behavior of the wanted feature

Mpv should support viewing/browsing DVD menus. This should work when reading a disc directly, as well as when opening a VIDEO_TS directory. Ideally, both mouse and keyboard navigation should work. For example, VLC supports all these use cases.

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I am aware of the wiki FAQ entry for DVD menus. The entry was written in 2019, and by a developer no longer associated with the project. The last (now closed) issue about this is also from over four years ago.

So, I'm opening this feature request since there does not already seem to be an open issue to track it. And I'm wondering whether the situation is still the same.