refactor: Pull Auditor extraction into Bundesanzeiger utils

tests/utils/data_extraction/__init__.py

@@ -0,0 +1 @@
+"""Tests for data_extraction."""

tests/utils/data_extraction/bundesanzeiger_test.py

@@ -0,0 +1,26 @@
+from aki_prj23_transparenzregister.utils.data_extraction.bundesanzeiger import (
+    Bundesanzeiger,
+)
+
+
+def test_extract_auditor_company_no_hits() -> None:
+    input_data = """
+        Nothing to see here \O_O/
+    """
+    ba = Bundesanzeiger()
+    result = ba.extract_auditor_company(input_data)
+    assert result is None
+
+
+def test_extract_auditor_company() -> None:
+    company_name = "Korrupte Wirtschaftsprüfer GmbH & Co. KG"
+    input_data = f"""
+        <b>
+            {company_name}
+            <br>
+            Max Mustermann
+        </b>
+    """
+    ba = Bundesanzeiger()
+    result = ba.extract_auditor_company(input_data)
+    assert result == company_name