Refactor: Reorganize project structure by moving core components into dedicated directories and introducing new configuration and API models.

Program.cs

@@ -1,5 +1,9 @@
 using System.Diagnostics;
-using Toak;
+using Toak.Audio;
+using Toak.Configuration;
+using Toak.Api;
+using Toak.Core;
+using Toak.IO;
 
 bool pipeToStdout = args.Contains("--pipe") || args.Contains("-p") || Console.IsOutputRedirected;
 bool copyToClipboard = args.Contains("--copy");