set up user settings data table and access repository

src/App/Models/Data/SettingsData.cs

@@ -0,0 +1,16 @@
+using SQLite;
+using Bit.App.Abstractions;
+
+namespace Bit.App.Models.Data
+{
+    [Table("Settings")]
+    public class SettingsData : IDataObject<string>
+    {
+        public SettingsData()
+        { }
+
+        [PrimaryKey]
+        public string Id { get; set; }
+        public string EquivalentDomains { get; set; }
+    }
+}