feat!: convert projects to .net 5 wip

Habittodo.Model/ChecklistItem.cs

@@ -0,0 +1,15 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Habittodo.Model
+{
+    public class ChecklistItem
+    {
+        [JsonProperty("id")]
+        public string Id { get; set; }
+        [JsonProperty("text")]
+        public string Text { get; set; }
+    }
+}