feat: add random rules attack using generate-rules.bin (#87)

- Add hcatGenerateRules() in main.py: runs generate-rules.bin to
  produce N random rules, writes them to a temp file, runs hashcat
  with -r against a chosen wordlist, cleans up on exit
- Add generate_rules_crack() handler in attacks.py with count
  prompt (default 65536), wordlist picker with tab-completion,
  input validation, and abort on invalid input
- Add dispatcher generate_rules_crack() in main.py and key "20"
  in both main.py and hate_crack.py get_main_menu_options()
- Add ("20", "Random Rules Attack") to get_main_menu_items()
- Add tests: test_random_rules_attack.py (menu presence, handler
  wiring), test_random_rules_wrapper.py (subprocess behavior,
  cleanup, count passing, count tracking)
- Add key "20" to MENU_OPTION_TEST_CASES in test_ui_menu_options.py
- Update README: add option 20 to menu listing, add attack
  description, add version history entry

tests/test_random_rules_attack.py

@@ -0,0 +1,45 @@
+import importlib.util
+import os
+import sys
+from pathlib import Path
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+
+
+def load_cli_module():
+    os.environ["HATE_CRACK_SKIP_INIT"] = "1"
+    for key in list(sys.modules.keys()):
+        if "hate_crack" in key:
+            del sys.modules[key]
+    spec = importlib.util.spec_from_file_location(
+        "hate_crack_cli", PROJECT_ROOT / "hate_crack.py"
+    )
+    mod = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(mod)
+    return mod
+
+
+@pytest.fixture
+def cli():
+    return load_cli_module()
+
+
+def test_generate_rules_crack_in_main_menu(cli):
+    options = cli.get_main_menu_options()
+    assert "20" in options
+
+
+def test_generate_rules_crack_handler_calls_main(cli, tmp_path):
+    ctx = MagicMock()
+    ctx.hcatHashType = "1000"
+    ctx.hcatHashFile = "/tmp/h.txt"
+    ctx.hcatWordlists = str(tmp_path)
+    ctx.list_wordlist_files.return_value = []
+    wl = tmp_path / "words.txt"
+    wl.write_text("password\n")
+    with patch("builtins.input", side_effect=["100", str(wl)]):
+        cli._attacks.generate_rules_crack(ctx)
+    ctx.hcatGenerateRules.assert_called_once_with("1000", "/tmp/h.txt", 100, str(wl))