initial fixing

Signed-off-by: Jess Frazelle <github@jessfraz.com>

kittycad/models/file_output_format.py

@@ -0,0 +1,13 @@
+from enum import Enum
+
+
+class FileOutputFormat(str, Enum):
+    STL = 'stl'
+    OBJ = 'obj'
+    DAE = 'dae'
+    STEP = 'step'
+    FBX = 'fbx'
+    FBXB = 'fbxb'
+
+    def __str__(self) -> str:
+        return str(self.value)