feat(wip): add updates decorators

lib/decorators/core/on.decorator.ts

@@ -0,0 +1,25 @@
+import { applyDecorators, SetMetadata } from '@nestjs/common';
+import {
+  TELEGRAF_LISTENER_OPTIONS,
+  TELEGRAF_LISTENER_TYPE,
+} from '../../telegraf.constants';
+import { ListenerType } from '../../enums/listener-type.enum';
+import { TelegrafUpdateType } from '../../telegraf.types';
+
+export interface OnOptions {
+  updateTypes: TelegrafUpdateType;
+}
+
+/**
+ * Registers middleware for provided update type.
+ *
+ * @see https://telegraf.js.org/#/?id=on
+ */
+export const On = (updateTypes: TelegrafUpdateType): MethodDecorator => {
+  return applyDecorators(
+    SetMetadata(TELEGRAF_LISTENER_TYPE, ListenerType.On),
+    SetMetadata(TELEGRAF_LISTENER_OPTIONS, {
+      updateTypes,
+    } as OnOptions),
+  );
+};

lib/decorators/core/use.decorator.ts

@@ -0,0 +1,12 @@
+import { SetMetadata } from '@nestjs/common';
+import { TELEGRAF_LISTENER_TYPE } from '../../telegraf.constants';
+import { ListenerType } from '../../enums/listener-type.enum';
+
+/**
+ * Registers a middleware.
+ *
+ * @see https://telegraf.js.org/#/?id=use
+ */
+export const Use = (): MethodDecorator => {
+  return SetMetadata(TELEGRAF_LISTENER_TYPE, ListenerType.Use);
+};