Get initial scaffolding set up for lambda config

mre_lambda.py

@@ -0,0 +1,8 @@
+import boto3
+from aws_lambda_typing.events import S3Event
+from aws_lambda_typing.context import Context
+from .mre import compute_mre
+
+
+def lambda_handler(event: S3Event, context: Context):
+    return None

requirements.txt

@@ -1,2 +1,4 @@
 boto3==1.38.14
 botocore==1.38.14
+aws-lambda-typing==2.20.0
+