add more

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

kittycad/models/file_conversion_source_format.py

@@ -0,0 +1,11 @@
+from enum import Enum
+
+class FileConversionSourceFormat(str, Enum):
+	STL = 'stl'
+	OBJ = 'obj'
+	DAE = 'dae'
+	STEP = 'step'
+	FBX = 'fbx'
+
+	def __str__(self) -> str:
+		return str(self.value)