feat: move i18n type utils to lib and describe (#33)

src/models/i18next.d.ts

@@ -1,24 +1,5 @@
 import defaultLocale from '../../locales/ru.json';
-
-type Split<S extends string, D extends string> =
-  S extends `${infer A}${D}${infer B}` ? [A, ...Split<B, D>] : [S];
-
-type NestedObject<T extends string[]> =
-  T extends [infer Head, ...infer Tail] ?
-    Head extends string ?
-      { [key in Head]: NestedObject<Tail extends string[] ? Tail : []> } : never :
-    string;
-
-// Основная утилита для обработки union type
-type CreateTree<T> =
-  UnionToIntersection<T extends infer U ?
-    U extends string ?
-      NestedObject<Split<U, '.'>> : never : never>;
-
-// Утилита для объединения типов
-type UnionToIntersection<U> =
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  (U extends any ? (k: U) => void : never) extends (k: infer I) => void ? I : never;
+import { CreateTree } from '../lib';
 
 type LanguageResource = CreateTree<keyof typeof defaultLocale>;
 
@@ -26,6 +7,6 @@ declare module "i18next" {
   interface CustomTypeOptions {
     resources: {
       '~': LanguageResource
-    };
+    }
   }
 }