Bundle LSL's LabRecorder features into app

[jdpigeon]

Currently our LSL compatibility requires the user to have LabRecorder running on their machine.

  LabRecorder responsibility         │ You have? │ Difficulty to add
  ───────────────────────────────────┼───────────┼──────────────────
  Resolve all streams on network     │   YES     │ —
  Record ONE stream                  │   YES     │ —
  Record N streams simultaneously    │   NO      │ Medium (lift inlet
                                     │           │  from 1→many)
  Cross-stream clock sync (time_     │   NO      │ HARD ← the real value
   correction offsets per stream)    │           │  add; wrong = silent
                                     │           │  ERP corruption
  Record external marker stream      │   NO      │ Medium
  XDF output (interop standard)      │   NO      │ Medium (or stay CSV
                                     │           │  and lose interop)

We should incorprate the remaining features into the app so that we can remove the requirement before we release into schools. It will make install much more simple.