Feature flags (#543)

* Re-organize a bit controllers

* Added the featureflagcontroller

* Implement feature flags in the front-end

* Clean env files

* Clean console.log messages

* Fix feature flag test

client/plugins/featureFlags.js

@@ -0,0 +1,9 @@
+import { useFeatureFlagsStore } from '~/stores/featureFlags'
+
+export default defineNuxtPlugin((nuxtApp) => {
+  const featureFlagsStore = useFeatureFlagsStore()
+
+  nuxtApp.provide('featureFlag', (key, defaultValue = false) => {
+    return featureFlagsStore.getFlag(key, defaultValue)
+  })
+})