feat: Add FFmpeg audio recording and ydotool typing backends, making them configurable.

Core/Constants.cs

@@ -34,6 +34,7 @@ public static class Constants
         public const string ProcessKill = "kill";
         public const string TypeX11 = "xdotool";
         public const string TypeWayland = "wtype";
+        public const string TypeYdotool = "ydotool";
         public const string Notify = "notify-send";
         public const string PlaySound = "paplay";
         public const string ClipboardX11 = "xclip";

Core/DaemonService.cs

@@ -54,11 +54,15 @@ public static class DaemonService
         var notifications = new Notifications();
 
         var groqClient = new GroqApiClient(config.GroqApiKey);
+        IAudioRecorder recorder = config.AudioBackend == "ffmpeg" 
+            ? new FfmpegAudioRecorder(stateTracker, notifications) 
+            : new AudioRecorder(stateTracker, notifications);
+
         var orchestrator = new TranscriptionOrchestrator(
             groqClient, 
             groqClient, 
             configManager, 
-            new AudioRecorder(stateTracker, notifications), 
+            recorder, 
             notifications, 
             new TextInjector(notifications), 
             new HistoryManager(),