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/start-server-with-environment.js

@@ -0,0 +1,28 @@
+const setupServer = require("./setup-server")
+const { initDb } = require("./use-db")
+
+const startServerWithEnvironment = async ({ cwd, verbose, env }) => {
+  if (env) {
+    Object.entries(env).forEach(([key, value]) => {
+      process.env[key] = value
+    })
+  }
+
+  const dbConnection = await initDb({
+    cwd,
+  })
+
+  Object.entries(env).forEach(([key, value]) => {
+    delete process.env[key]
+  })
+
+  const medusaProcess = await setupServer({
+    cwd,
+    verbose,
+    env,
+  })
+
+  return [medusaProcess, dbConnection]
+}
+
+export default startServerWithEnvironment