feat!: convert projects to .net 5 wip

Habittodo.Model/TodoHabitLink.cs

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