Add Answer DTOs

application/model/src/main/java/org/fuseri/model/dto/exercise/AnswerCreateDto.java

+package org.fuseri.model.dto.exercise;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@AllArgsConstructor
+@Getter
+public class AnswerCreateDto {
+    private String text;
+    private boolean correct;
+    private String questionId;
+}

application/model/src/main/java/org/fuseri/model/dto/exercise/AnswerDto.java

+package org.fuseri.model.dto.exercise;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.fuseri.model.dto.common.DomainObjectDto;
+
+@AllArgsConstructor
+@Getter
+public class AnswerDto extends DomainObjectDto {
+    private String text;
+    private boolean correct;
+}

application/model/src/main/java/org/fuseri/model/dto/exercise/AnswerInQuestionCreateDto.java

+package org.fuseri.model.dto.exercise;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@AllArgsConstructor
+@Getter
+public class AnswerInQuestionCreateDto {
+    private String text;
+    private boolean correct;
+}

application/model/src/main/java/org/fuseri/model/dto/exercise/AnswersCreateDto.java

+package org.fuseri.model.dto.exercise;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+import java.util.List;
+
+@AllArgsConstructor
+@Getter
+public class AnswersCreateDto {
+    private String questionId;
+    private List<AnswerDto> answerDtos;
+}