MKVToolNix 87.0 “Black as the Sky”

# Version 87.0 "Black as the Sky" 2024-09-07

## New features and enhancements

* mkvmerge: chapters: added support for specifying MPLS files with
  `--chapters`, too, not just as regular source files. The documentation
  stated this was possible already, but that wasn't actually the
  case. Implements/fixes #3735.
* MKVToolNix GUI: multiplexer: added a progress dialog that is shown during
  file identification.
* MKVToolNix GUI: jobs: the status bar now differentiates between numbers of
  warnings/errors that occurred in the current session and those that occurred
  before the current session. Implements #3732.

## Bug fixes

* mkvmerge: AAC parser: LOAS/LATM streams: if the first `AudioSpecificConfig`
  element is not found within the first LOAS/LATM frame, `mkvmerge` will no
  longer discard the frames before it but defer parsing them until after it
  has found the `AudioSpecificConfig` element. Fixes #3727.
* MKVToolNix GUI: job queue: fixed the GUI crashing when re-ordering the jobs
  in the job queue. This regression was introduced while fixing #3720. Fixes
  #3729.

## Build system changes

* The bundled `fmt` library was updated to v10.2.1.