feat(frontend): russian and english interface with a language choice in settings, soon stubs removed

frontend/src/lib/i18n/messages.ts

@@ -0,0 +1,9 @@
+import { common } from "#lib/i18n/messages/common.js";
+import { settings } from "#lib/i18n/messages/settings.js";
+
+export const messages = {
+  ...common,
+  ...settings,
+};
+
+export type MessageKey = keyof typeof messages;