Endpoints to see groups

BeReadyBackend/DTO/Groups/GetGroupDetailsDto.cs

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+using BeReadyBackend.DTO.Messages;
+
+namespace BeReadyBackend.DTO.Groups;
+
+public class GetGroupDetailsDto
+{
+    public int Id { get; set; }
+    public string? Label { get; set; }
+    public bool IsFinished { get; set; }
+    public string? Title { get; set; }
+    public string? Description { get; set; }
+    public int Duration { get; set; }
+    public DateTime CreationDate { get; set; }
+    
+    public List<GetMessageDto>? Messages { get; set; }
+    public List<GetUserGroupDto>? Users { get; set; }
+}

BeReadyBackend/DTO/Groups/GetGroupDto.cs

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+namespace BeReadyBackend.DTO.Groups;
+
+public class GetGroupDto
+{
+    public int Id { get; set; }
+    public string? Label { get; set; }
+    public bool IsFinished { get; set; }
+}

BeReadyBackend/DTO/Messages/GetMessageDto.cs

@@ -0,0 +1,10 @@
+namespace BeReadyBackend.DTO.Messages;
+
+public class GetMessageDto
+{
+    public int Id { get; set; }
+    public string? Libelle { get; set; }
+    public DateTime SendDate { get; set; }
+    public int UserId { get; set; }
+    public string? Username { get; set; }
+}