Feat: Create customer group (#1074)

* fix babel transform-runtime regenerator required for migrations

* add customer group model

* add migration for customer group

* add customer group model export

* add customer group repository

* add customer group service

* add CustomerGroupRepository to "withTransaction" in CustomerGroupService

* remove unnecessary argument to runtime plugin

* service export ordering

* add create customer group endpoint

* add customergroup to route index in admin

* add customer group service

* add customer groups test

* cleanup

* duplicate error handling

* ducplicate name integration test

* add jsdoc

* customergroup not customer

* pr feedback

* pipeline test

* fix weird merge

Co-authored-by: Sebastian Rindom <skrindom@gmail.com>

packages/medusa-interfaces/.babelrc

@@ -1,7 +1,8 @@
 {
   "plugins": [
     "@babel/plugin-proposal-class-properties",
-    "@babel/plugin-transform-instanceof"
+    "@babel/plugin-transform-instanceof",
+    ["@babel/plugin-transform-runtime", { "regenerator": true }]
   ],
   "presets": ["@babel/preset-env"],
   "env": {