Feat(medusa): implement feature flags (#1768)

* feat: add feature flag loading in projects

* fix: make feature flag consume itself

* fix: rename container registration to featureFlagRouter

* fix: refactor

* behavioral feature flags

* add environment to server

* limit "useTemplateDb" to non feature flagged migrations

* filter migrations and entities according to those which are enabled in the environment

* run only migrations that are enabled when running 'medusa migrations run'

* add logging to the featureflag loader

* initial implementation of featureFlagEntity

* column descriptors

* initial startServerWithEnv (to be refactored)

* update commands

* final touches

* update loaders to fix unit tests

* enable all batch job tests

* update seed method

* add api test capabilities

* revert batch job test

* revert formatting changes

* pr feedback

* pr feedback

* remove unused imports

* rename feature flag decorators

* pr feedback

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

integration-tests/helpers/setup-server.js

@@ -2,7 +2,7 @@ const path = require("path")
 const { spawn } = require("child_process")
 const { setPort } = require("./use-api")
 
-module.exports = ({ cwd, redisUrl, uploadDir, verbose }) => {
+module.exports = ({ cwd, redisUrl, uploadDir, verbose, env }) => {
   const serverPath = path.join(__dirname, "test-server.js")
 
   // in order to prevent conflicts in redis, use a different db for each worker
@@ -21,6 +21,7 @@ module.exports = ({ cwd, redisUrl, uploadDir, verbose }) => {
         COOKIE_SECRET: "test",
         REDIS_URL: redisUrl ? redisUrlWithDatabase : undefined, // If provided, will use a real instance, otherwise a fake instance
         UPLOAD_DIR: uploadDir, // If provided, will be used for the fake local file service
+        ...env,
       },
       stdio: verbose
         ? ["inherit", "inherit", "inherit", "ipc"]