Feat/assistant app (#2086)

Co-authored-by: chenhe <guchenhe@gmail.com>
Co-authored-by: Pascal M <11357019+perzeuss@users.noreply.github.com>

api/core/file/file_obj.py

@@ -22,6 +22,7 @@ class FileType(enum.Enum):
 class FileTransferMethod(enum.Enum):
     REMOTE_URL = 'remote_url'
     LOCAL_FILE = 'local_file'
+    TOOL_FILE = 'tool_file'
 
     @staticmethod
     def value_of(value):
@@ -30,6 +31,16 @@ class FileTransferMethod(enum.Enum):
                 return member
         raise ValueError(f"No matching enum found for value '{value}'")
 
+class FileBelongsTo(enum.Enum):
+    USER = 'user'
+    ASSISTANT = 'assistant'
+
+    @staticmethod
+    def value_of(value):
+        for member in FileBelongsTo:
+            if member.value == value:
+                return member
+        raise ValueError(f"No matching enum found for value '{value}'")
 
 class FileObj(BaseModel):
     id: Optional[str]