feat(decorators): metadata typings added

lib/decorators/telegraf-action.decorator.ts

@@ -2,12 +2,20 @@ import { SetMetadata } from '@nestjs/common';
 import { DECORATORS } from '../telegraf.constants';
 import { HearsTriggers } from 'telegraf';
 
+export type TelegrafActionTriggers = HearsTriggers;
+
+export interface TelegrafActionMetadata {
+  triggers: TelegrafActionTriggers;
+}
+
 /**
  * Registers middleware for handling callback_data actions with regular expressions.
  * @param triggers Triggers
  *
  * https://telegraf.js.org/#/?id=action
  */
-export function TelegrafAction(triggers: HearsTriggers): MethodDecorator {
+export function TelegrafAction(
+  triggers: TelegrafActionTriggers,
+): MethodDecorator {
   return SetMetadata(DECORATORS.ACTION, { triggers });
 }