feat: add startup version check, fix PassGPT MPS/output issues, hide menu without ML deps

- Add optional startup version check against GitHub releases (check_for_updates config option)
- Add packaging dependency for version comparison
- Fix PassGPT OOM on MPS by capping batch size to 64 and setting memory watermark limits
- Fix PassGPT output having spaces between every character
- Hide PassGPT menu item (17) unless torch/transformers are installed
- Fix mypy errors in passgpt_generate.py with type: ignore comments
- Update README with version check docs, optional ML deps section, and PassGPT CLI options
- Add test_version_check.py with 8 tests covering update check behavior

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hate_crack.py

@@ -85,7 +85,6 @@ def get_main_menu_options():
         "14": _attacks.loopback_attack,
         "15": _attacks.ollama_attack,
         "16": _attacks.omen_attack,
-        "17": _attacks.passgpt_attack,
         "90": download_hashmob_rules,
         "91": weakpass_wordlist_menu,
         "92": download_hashmob_wordlists,
@@ -96,6 +95,8 @@ def get_main_menu_options():
         "98": show_readme,
         "99": quit_hc,
     }
+    if globals().get("HAS_ML_DEPS"):
+        options["17"] = _attacks.passgpt_attack
     # Only show Hashview API when configured.
     if globals().get("hashview_api_key"):
         options["94"] = hashview_api