- Add High-water Mark setting on the ZMQ output socket with default value of 1
- Add binary option to set the HWM + help info

* Use `fles::InputArchive` / `fles::OutputArchive` to read / write archives
* Reuse `fles::ArchiveDescriptor` as archive header
* Removed `--split-output-per-ts` flag
* Update `RecoResultsDescriptor` to include timeslice-index and start time
* Added `--dump-archive` flag to quickly inspect written archives for basic debugging
* Removed ability to add wildcards in output filename e.g. for hostname (this should be handled by slurm-startscript)

- Rename file to Definitions.h
- Replace Detectors-enum with fles::SubsystemIdentifier