Add the missing data files

example-data/nomad_sim/gdb13_7k/dsgdb7njp.csv

example-data/nomad_sim/gdb13_7k/dsgdb7njp.xyz

example-data/nomad_sim/gdb13_7k/dsgdb7njp_ase.xyz

example-data/nomad_sim/gdb13_7k/dsgdb7njp_ase_attributes.xyz

example-data/nomad_sim/gdb13_7k/dsgdb7njp_cvsplits.txt

example-data/nomad_sim/gdb13_7k/dsgdb7njp_pp.xyz

example-data/nomad_sim/gdb13_7k/dsgdb7njp_red.xyz

example-data/nomad_sim/gdb13_7k/dsgdb7njp_subset1k.txt

example-data/nomad_sim/gdb13_7k/readme.txt