cli-v1.12.0

Added

• Fix common EPUB issues (epublift repair). New CLI subcommand that
  automatically fixes three specific structural defects in an EPUB's package
  document — nothing else, and no per-issue prompts, all applicable fixes are
  applied in one pass:

  • Duplicate spine entries — the same chapter listed twice in the
    reading order; the first occurrence is kept, later ones are dropped.
  • Empty or legacy metadata fields — blank dc:title, dc:date,
    dc:publisher, etc. are removed. Safety guard: the book's only
    title/identifier/language, or its unique-identifier anchor, is never
    removed even if empty.
  • Dangling references — a manifest entry pointing at a file that
    doesn't exist in the archive, or a spine entry pointing at a manifest
    entry that doesn't exist (including one just removed above).

  This is deliberately narrow — it doesn't touch content documents (chapter
  XHTML), and it's not a substitute for check/Validate, which still covers
  far more of the spec. Writes a new file; the input is never modified.
  --dry-run previews the fix without writing anything. Ships in the
  default build (no new dependencies). See docs/repair.md.

Full Changelog: cli-v1.11.0...cli-v1.12.0