refactor: remove PassGPT attack (option 17)

Remove the ML-based PassGPT password generation feature entirely:
modules, config keys, [ml] optional dependency group, menu entries,
tests, and documentation.

config.json.example

@@ -26,9 +26,5 @@
   "ollamaNumCtx": 2048,
   "omenTrainingList": "rockyou.txt",
   "omenMaxCandidates": 1000000,
-  "passgptModel": "javirandor/passgpt-10characters",
-  "passgptMaxCandidates": 1000000,
-  "passgptBatchSize": 1024,
-  "passgptTrainingList": "rockyou.txt",
   "check_for_updates": true
 }