Restructured the project structure back to the way it was, there's no reasonable way to split the modules

src/NadekoBot/Db/Models/Reminder.cs

@@ -0,0 +1,19 @@
+#nullable disable
+namespace Nadeko.Bot.Db.Models;
+
+public class Reminder : DbEntity
+{
+    public DateTime When { get; set; }
+    public ulong ChannelId { get; set; }
+    public ulong ServerId { get; set; }
+    public ulong UserId { get; set; }
+    public string Message { get; set; }
+    public bool IsPrivate { get; set; }
+    public ReminderType Type { get; set; }
+}
+
+public enum ReminderType
+{
+    User,
+    Timely
+}