fix: Ensure that __init__ files exist in proto dirs

Signed-off-by: Achal Shah <achals@gmail.com>

Author: achals

sdk/python/setup.py

@@ -224,6 +224,11 @@ def run(self):
             with open(f"{self.python_folder}/feast/{sub_folder}/__init__.py", 'w'):
                 pass
 
+        with open(f"{self.python_folder}/__init__.py", 'w'):
+            pass
+        with open(f"{self.python_folder}/feast/__init__.py", 'w'):
+            pass
+
         for path in Path("feast/protos").rglob("*.py"):
             for folder in self.sub_folders:
                 # Read in the file