Adding tests for App

WIP make VMs app agnostic

ModernKeePass/Interfaces/IDatabase.cs

@@ -0,0 +1,20 @@
+using ModernKeePass.ViewModels;
+using ModernKeePassLib;
+using ModernKeePassLib.Keys;
+
+namespace ModernKeePass.Interfaces
+{
+    public interface IDatabase
+    {
+        bool RecycleBinEnabled { get; set; }
+        int Status { get; set; }
+        GroupVm RootGroup { get; set; }
+        GroupVm RecycleBin { get; set; }
+
+        void Open(CompositeKey key, bool createNew);
+        void UpdateCompositeKey(CompositeKey key);
+        bool Save();
+        void CreateRecycleBin();
+        void AddDeletedItem(PwUuid id);
+    }
+}