feat(decorators): metadata typings added

lib/decorators/telegraf-phone.decorator.ts

@@ -1,12 +1,18 @@
 import { SetMetadata } from '@nestjs/common';
 import { DECORATORS } from '../telegraf.constants';
 
+export type TelegrafPhonePhone = string | string[];
+
+export interface TelegrafPhoneMetadata {
+  phone: TelegrafPhonePhone;
+}
+
 /**
  * Phone number handling.
  * @param phone Phone number
  *
  * https://telegraf.js.org/#/?id=phone
  */
-export function TelegrafPhone(phone: string | string[]): MethodDecorator {
+export function TelegrafPhone(phone: TelegrafPhonePhone): MethodDecorator {
   return SetMetadata(DECORATORS.PHONE, { phone });
 }