Relocate PCD .cif files that have no atomic site/label while preprocessing each .cif file

[bobleesj]

• feat: run preprocess step while moving files based on errors to move cif files without site/label
• feat: Relocate PCD .cif files that have no atomic site/label while preprocesing each .cif file
• relocate PCD files when no labels/sites are found

Closes #74

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.29%. Comparing base (e5fd787) to head (fb0a4d9).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #75   +/-   ##
=======================================
  Coverage   97.29%   97.29%           
=======================================
  Files          36       36           
  Lines        1406     1406           
=======================================
  Hits         1368     1368           
  Misses         38       38           

Files with missing lines	Coverage Δ
tests/core/models/test_cif.py	89.61% <100.00%> (ø)