Add Instagram-style social features and Postman collections

src/modules/likes/dto/toggle-like.dto.ts

@@ -1,5 +1,6 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsIn, IsMongoId } from 'class-validator';
+import { IsEnum, IsIn, IsMongoId, IsOptional } from 'class-validator';
+import { ReactionType } from '../../../common/enums/reaction-type.enum';
 
 export class ToggleLikeDto {
   @ApiProperty()
@@ -9,4 +10,9 @@ export class ToggleLikeDto {
   @ApiProperty({ enum: ['post', 'comment'] })
   @IsIn(['post', 'comment'])
   targetType!: 'post' | 'comment';
+
+  @ApiProperty({ enum: ReactionType, required: false, default: ReactionType.LIKE })
+  @IsOptional()
+  @IsEnum(ReactionType)
+  reactionType?: ReactionType;
 }