B2B-88: add starter kit structure and elements

config/billing.config.ts

@@ -0,0 +1,8 @@
+/*
+Replace this file with your own billing configuration file.
+Copy it from billing.sample.config.ts and update the configuration to match your billing provider and products.
+This file will never be overwritten by git updates
+ */
+import sampleSchema from './billing.sample.config';
+
+export default sampleSchema;