Adding code for the Azure Food Scale guide

Adding code for the Azure Food Scale project

Author: BlitzCityDIY

Azure_Food_Scale/calibration.py

@@ -0,0 +1,7 @@
+# SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+calibration = {
+    'offset_val' : 29.06,
+    'weight' : 30 #  in grams
+    }