support case insensitive and normalized file and folder names.

mdrsclient/models/folder.py

@@ -1,4 +1,5 @@
 from typing import Final, NamedTuple
+from unicodedata import normalize
 
 from pydantic.dataclasses import dataclass
 
@@ -71,7 +72,9 @@ class Folder(FolderSimple):
     path: str
 
     def find_sub_folder(self, name: str) -> FolderSimple | None:
-        return next((x for x in self.sub_folders if x.name == name), None)
+        _name = normalize("NFC", name).lower()
+        return next((x for x in self.sub_folders if x.name.lower() == _name), None)
 
     def find_file(self, name: str) -> File | None:
-        return next((x for x in self.files if x.name == name), None)
+        _name = normalize("NFC", name).lower()
+        return next((x for x in self.files if x.name.lower() == _name), None)