feat(medusa): Parsing CSV files (#1572)

* add: csv parser

* fix: tests

* fix: linting + comment

* add: missing dependency

* fix: generic transformers

* fix: address comments

* fix: make parser options generic

* add: support regex columns + fix missing columns bug

* improve test case

* add: support for reducer + tests

* fix: add comments to csv parser

packages/medusa/package.json

@@ -79,6 +79,7 @@
     "morgan": "^1.9.1",
     "multer": "^1.4.2",
     "node-schedule": "^2.1.0",
+    "papaparse": "^5.3.2",
     "passport": "^0.4.0",
     "passport-http-bearer": "^1.0.1",
     "passport-jwt": "^4.0.0",