refactor: move flags into settings, change icon (#5678)

* refactor: move flags into settings, change icon

* fix: use ButtonStyled for app

packages/ui/src/locales/en-US/index.json

@@ -2714,6 +2714,9 @@
   "settings.display.theme.title": {
     "defaultMessage": "Color theme"
   },
+  "settings.feature-flags.title": {
+    "defaultMessage": "Feature flags"
+  },
   "settings.language.categories.default": {
     "defaultMessage": "Standard languages"
   },

packages/ui/src/utils/common-messages.ts

@@ -856,6 +856,10 @@ export const commonSettingsMessages = defineMessages({
 		id: 'settings.billing.title',
 		defaultMessage: 'Billing and subscriptions',
 	},
+	featureFlags: {
+		id: 'settings.feature-flags.title',
+		defaultMessage: 'Feature flags',
+	},
 	language: {
 		id: 'settings.language.title',
 		defaultMessage: 'Language',