better legacy mode compatibility

Most of the changes are under the hood changes intended for future proofing that most users won't notice, however, users dumping files from Fire Emblem Warriors: Three Hopes (and Nioh 3) through the -fe argument should notice some small improvements.

• You can now use the -v1 argument instead of the -fe argument (-fe was kept for legacy reasons)

• This now uses the same code as the regular dumping mode (internally named "v2")

  • What this means is the following:
  • The dumped files will now be sorted into different categories if a database file is successfully dumped during the preprocessing
  • This means v1 mode will now also benefit from the attempt at finding name files to auto rename dumped files

  (Please note that these features were already present in the default/v2 dumping mode, these are simply being added to v1 as they were only missing due to an oversight on my part and forgetting to update the code).