Tests need upgrade/completion

[ardunn]

• Tests should be organized on a module-by-module basis; they are currently like halfway there
• Many test files bloating the repo that are never used
• Test files are not separated by module
• Some module need need more testing:
  • structure.validation: tests were disabled to accommodate changes in validation from [mat-2116] Rework CLI using Click, remove JSON requirements for use #107 and no longer apply to integration of validation with structuring
  • CLI needs an end-to-end test on a minimal set of small files
  • CLI needs a few more test cases for structure, featurize , train, predict
  • CLI inspect test needs to be debugged on CI although passing locally
  • auto_load and auto_load_processed need to run thru at least one of each file, plus a legacy file for auto_loaded_processed
• Re-enable windows tests?