Implemented strict mode for the project (broken tests, hundreds of @ts-ignore and new errors are included) [skip ci]

packages/app/i18n/index.d.ts

@@ -0,0 +1,13 @@
+declare module 'app/i18n' {
+  export interface Locale {
+    code: string;
+    name: string;
+    englishName: string;
+    progress: number;
+    isReleased: boolean;
+  }
+
+  const LANGS: Record<string, Locale>;
+
+  export default LANGS;
+}