feat: Introduce default profile sections and fields, updating schema with isSystem and isSearchableOnly properties.

src/profile-fields/dto/create-field.dto.ts

@@ -89,6 +89,11 @@ export class CreateFieldDto {
   @IsBoolean()
   isRequired?: boolean;
 
+  @ApiPropertyOptional({ description: 'Whether this field is for search only (hidden from public profile)', default: false })
+  @IsOptional()
+  @IsBoolean()
+  isSearchableOnly?: boolean;
+
   @ApiPropertyOptional({ description: 'Validation rules (JSON object)' })
   @IsOptional()
   @IsObject()