[fix] add utils.py

src/jobspy/utils.py

@@ -0,0 +1,9 @@
+import re
+from typing import Optional
+
+
+def extract_emails_from_text(text: str) -> Optional[list[str]]:
+    if not text:
+        return None
+    email_regex = re.compile(r"[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}")
+    return email_regex.findall(text)