feat!: convert projects to .net 5 wip

Habittodo.Model/HabitTodoLink.cs

@@ -0,0 +1,28 @@
+using Microsoft.Azure.Cosmos.Table;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Habittodo.Model
+{
+    public class HabitTodoLink : TableEntity
+    {
+        public HabitTodoLink() { }
+
+        public HabitTodoLink(string userId, string habiticaId, string todoistId, string habiticaParentId = null)
+        {
+            PartitionKey = userId;
+            RowKey = habiticaId;
+            HabiticaParentId = habiticaParentId;
+            TodoistId = todoistId;
+        }
+
+        public string HabiticaParentId { get; set; }
+        public string TodoistId { get; set; }
+
+        public TodoHabitLink Reverse()
+        {
+            return new TodoHabitLink(PartitionKey, TodoistId, RowKey);
+        }
+    }
+}