Add pdf helper -> save temporary file to pdf

superfaktura/utils/__init__.py

@@ -0,0 +1,10 @@
+import tempfile
+from typing import IO
+
+
+def save_temporary_file_as_pdf(
+    temp_file: IO[bytes], output_path: str = "output.pdf"
+) -> None:
+    with open(output_path, "wb") as f:
+        f.write(temp_file.read())
+        temp_file.close()