refactor: use cracked .out file as sole wordlist source for Ollama attack

Remove ollamaWordlist config key and all references. Wordlist mode now
requires the cracked hashes .out file to exist and extracts passwords
by splitting on the first colon. Detect Ollama refusal responses and
abort gracefully. Update tests accordingly.

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

config.json.example

@@ -24,6 +24,5 @@
   "hashview_api_key": "",
   "hashmob_api_key": "",
   "ollamaModel": "llama3.2",
-  "ollamaWordlist": "rockyou.txt",
   "ollamaNumCtx": 32768
 }