First pass at introducing kestrel and refactoring to make the RESTAPI be its own package.

Duplicati.Library.RestAPI/Database/Database schema/1. Add Notifications.sql

@@ -0,0 +1,14 @@
+/*
+Notifications not yet acknowledged by the user
+*/
+CREATE TABLE "Notification" (
+    "ID" INTEGER PRIMARY KEY,
+    "Type" TEXT NOT NULL,
+    "Title" TEXT NOT NULL,
+    "Message" TEXT NOT NULL, 
+    "Exception" TEXT NOT NULL, 
+    "BackupID" TEXT NULL,
+    "Action" TEXT NOT NULL,
+    "Timestamp" INTEGER NOT NULL
+);
+