Huge application refactoring to better support plugins (#960)

* Move shared code to Shared project
* Move from Realm to Squealify
* Rename Daybreak.Shared namespaces
* Setup API project to expose a test API

Daybreak.Shared/Exceptions/ExecutableNotFoundException.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace Daybreak.Shared.Exceptions;
+
+public sealed class ExecutableNotFoundException : Exception
+{
+    public ExecutableNotFoundException()
+    {
+    }
+
+    public ExecutableNotFoundException(string message) : base(message)
+    {
+    }
+
+
+    public ExecutableNotFoundException(string message, Exception innerException) : base(message, innerException)
+    {
+    }
+}