docs(audiobooks): archive ABS bookmarks implementation plan

The plan that drove the now-completed bookmarks sub-project. Belongs
on the branch alongside its sibling spec (committed in 73b9aca) per
the project convention of checking in both spec and plan.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
RXWatcher
2026-05-26 16:36:21 +02:00
co-authored by Claude Opus 4.7
parent 0fb8323503
commit 139ec96f21
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