feat: complete auth and submission's swagger docs

src/modules/submissions/dtos/responses/get-choice.dto.ts

@@ -0,0 +1,12 @@
+import { ApiProperty } from '@nestjs/swagger';
+
+export class GetChoiceDTO {
+  @ApiProperty()
+  id!: number;
+
+  @ApiProperty()
+  order!: number;
+
+  @ApiProperty()
+  text!: string;
+}