Add project files.

ModVersionChecker/managers/litedb/LiteDbSingleton.cs

@@ -0,0 +1,12 @@
+using LiteDB;
+
+public static class LiteDbSingleton
+{
+    private static readonly LiteDatabase _db = new LiteDatabase(new ConnectionString
+    {
+        Filename = "ModVersionChecker.db",
+        Connection = ConnectionType.Shared
+    });
+
+    public static LiteDatabase Instance => _db;
+}