Reader for metronix .ats files

[kkappler]

Rough workflow

• Add test data to mth5_test_data repository here
  • Mayotte data shared by BRGM in this format.
  • MTHotel "NorthernMining" example data
  • This is done in mth5_test_data PR5
• Following the example of mth5/io/metronix/metronix_metadata.MetronixChannelJSON, create a similar, mt_metadata-based class MetronixRunXML that ingests the xml files. Hopefully we can then have channel metadata generated from this object (together with the filename metadata). The only open source reader we know to get the XML is resistics
• Following the example of mth5/io/metronix/metronix_atss.ATSS, create a mth5/io/metronix/metronix_ats.ATS that can read the ATS files. Resistics may also be handy for this, btu there is a bit of wrangling to do because of how they handle timestamps.
• Implement a Collection that can handle ATS files (can follow the Metronix Collection already implemented, but there will be some work here to keep everything clean, while still avoiding duplication of code.
• Create a test workflow that uses make_mth5 and produces mth5 files.
• verify with simple time series plots and make a TF to see that things look reasonable