fix for file.list api pagination

mdrsclient/models/file.py

@@ -1,4 +1,5 @@
 from typing import Any
+from unicodedata import normalize
 
 from pydantic.dataclasses import dataclass
 
@@ -25,3 +26,8 @@ class File:
     @property
     def updated_at_name(self) -> str:
         return iso8601_to_user_friendly(self.updated_at)
+
+
+def find_file(files: list[File], name: str) -> File | None:
+    _name = normalize("NFC", name).lower()
+    return next((x for x in files if x.name.lower() == _name), None)