feat: introduce a background daemon service for persistent operation and inter-process communication.

Program.cs

@@ -23,6 +23,11 @@ public class Program
         toggleCmd.SetHandler(ToggleCommand.ExecuteAsync, pipeOption, copyOption, verboseOption);
         rootCommand.AddCommand(toggleCmd);
 
+        // Daemon Command
+        var daemonCmd = new Command("daemon", "Starts the background background service");
+        daemonCmd.SetHandler(Toak.Core.DaemonService.StartAsync, verboseOption);
+        rootCommand.AddCommand(daemonCmd);
+
         // Discard Command
         var discardCmd = new Command("discard", "Abort current recording without transcribing");
         discardCmd.AddOption(pipeOption);