feat: intl key intellisense

src/typings.d.ts

+import zh_CN from './locales/zh-CN';
+
 declare module '*.css';
 declare module '*.less';
 declare module '*.scss';
@@ -24,3 +26,11 @@ declare module 'memoize-one' {
   ): T;
   export default memoizeOne;
 }
+
+declare module 'umi-plugin-react/locale' {
+  export default interface MessageDescriptor {
+    id: keyof (typeof zh_CN); // default using zh_CN
+    description?: string;
+    defaultMessage?: string;
+  }
+}