[BE/#17] Feat : 모든 이슈 리스트 정보를 반환하는 DTO 추가

- issues : 각 이슈에 관한 정보 배열
- labelInfo : 등록되어 있는 레이블 갯수와 각 레이블에 대한 상세 정보 필드
- milestoneInfo : 등록 되어 있는 마일스톤의 갯수와 각 마일스톤에 대한 상세 정보 필드
- assigneeInfo : assignee로 지정할 수 있는 유저 리스트

BE/src/main/java/com/codesquad/issuetracker/ragdoll/dto/ListOfIssuesDto.java

@@ -0,0 +1,97 @@
+package com.codesquad.issuetracker.ragdoll.dto;
+
+import com.codesquad.issuetracker.ragdoll.dto.UserVO.UserSummary;
+import com.codesquad.issuetracker.ragdoll.dto.issueVO.IssueDetails;
+import com.codesquad.issuetracker.ragdoll.dto.labelVO.LabelInformation;
+import com.codesquad.issuetracker.ragdoll.dto.milestoneVO.MilestoneInformation;
+
+import java.util.List;
+
+public class ListOfIssuesDto {
+
+    private List<IssueDetails> issues;
+
+    private LabelInformation labelInfo;
+
+    private MilestoneInformation milestoneInfo;
+
+    private List<UserSummary> assigneeInfo;
+
+    public ListOfIssuesDto() {}
+
+    private ListOfIssuesDto(List<IssueDetails> issues, LabelInformation labelInfo, MilestoneInformation milestoneInfo, List<UserSummary> assigneeInfo) {
+        this.issues = issues;
+        this.labelInfo = labelInfo;
+        this.milestoneInfo = milestoneInfo;
+        this.assigneeInfo = assigneeInfo;
+    }
+
+    public static ListOfIssuesDto create(List<IssueDetails> issues, LabelInformation labelInfo, MilestoneInformation milestoneInfo, List<UserSummary> assigneeInfo) {
+        return new ListOfIssuesDto(issues, labelInfo, milestoneInfo, assigneeInfo);
+    }
+
+    public List<IssueDetails> getIssues() {
+        return issues;
+    }
+
+    public void setIssues(List<IssueDetails> issues) {
+        this.issues = issues;
+    }
+
+    public LabelInformation getLabelInfo() {
+        return labelInfo;
+    }
+
+    public void setLabelInfo(LabelInformation labelInfo) {
+        this.labelInfo = labelInfo;
+    }
+
+    public MilestoneInformation getMilestoneInfo() {
+        return milestoneInfo;
+    }
+
+    public void setMilestoneInfo(MilestoneInformation milestoneInfo) {
+        this.milestoneInfo = milestoneInfo;
+    }
+
+    public List<UserSummary> getAssigneeInfo() {
+        return assigneeInfo;
+    }
+
+    public void setAssigneeInfo(List<UserSummary> assigneeInfo) {
+        this.assigneeInfo = assigneeInfo;
+    }
+
+    public static class Builder {
+        private List<IssueDetails> issues;
+        private LabelInformation labelInfo;
+        private MilestoneInformation milestoneInfo;
+        private List<UserSummary> assigneeInfo;
+
+        public Builder() {}
+
+        public Builder issues(List<IssueDetails> issues) {
+            this.issues = issues;
+            return this;
+        }
+
+        public Builder labelInfo(LabelInformation labelInfo) {
+            this.labelInfo = labelInfo;
+            return this;
+        }
+
+        public Builder milestoneInfo(MilestoneInformation milestoneInfo) {
+            this.milestoneInfo = milestoneInfo;
+            return this;
+        }
+
+        public Builder assigneeInfo(List<UserSummary> assigneeInfo) {
+            this.assigneeInfo = assigneeInfo;
+            return this;
+        }
+
+        public ListOfIssuesDto build() {
+            return new ListOfIssuesDto(issues, labelInfo, milestoneInfo, assigneeInfo);
+        }
+    }
+}