Feature parse gdb xyz

[coltonbh]

Description

GDB .xyz files cannot be opened because they contain a 5th column (mulliken charges) and data after the usual xyz coordinates. This PR adds a catch-all to the line parsing and ignores everything after the z coordinate. It also stops xyz parsing after the coordinate lines have been iterated over. This allows more flexible xyz parsing by ignoring superfluous data, instead of raising exceptions.

Changelog description

Updated _filter_xyz function to ignore lines after cartesian coordinates in standard xyz files and additional columns in Cartesian coordinate rows. This enables parsing of gdb dataset xyz files.

Status

• [ x] Code base linted
• [ x] Ready to go

Note

I'm trying to be as surgical as possible here and add the flexibility without needing to create many additional cases. Please let me know if this appears too much of a hack. I think it may be a nice general case to make parsing more flexible (just ignore things we don't care about). I'm not familiar enough with xyz varieties to know if this may cause other errors. All current tests still pass.