Add project data

Tabletop.Core/Interfaces/ILocalizationHelper.cs

@@ -0,0 +1,13 @@
+namespace Tabletop.Core.Interfaces
+{
+    /// <summary>
+    /// Helper interface to provide properties which can be used within the interface <see cref="ILocalizedDbModel{T}"/>
+    /// </summary>
+    public interface ILocalizationHelper
+    {
+        /// <summary>
+        /// Gets or sets the ISO 639-1 two letter code for the language
+        /// </summary>
+        string Code { get; set; }
+    }
+}