refactor: decouple core-storage services from static keys and update i18n setup to use configurable storage adapters

apps/landing/src/core/storage/index.ts

@@ -0,0 +1,15 @@
+import { createLocalStorage } from '@repo/core-storage';
+
+export const AppStorageKey = {
+  LOCALE: 'app_locale',
+} as const;
+
+export type AppStorageKeyValue = (typeof AppStorageKey)[keyof typeof AppStorageKey];
+
+export const PLAIN_KEYS = new Set<AppStorageKeyValue>([
+  AppStorageKey.LOCALE,
+]);
+
+export const secureStorage = createLocalStorage<AppStorageKeyValue>({
+  plainTextKeys: PLAIN_KEYS
+});