feat: Implement a modular skill system with hotword detection, streaming text output, and enhanced logging.

IO/Notifications.cs

@@ -22,4 +22,47 @@ public static class Notifications
             Console.WriteLine($"[Notifications] Failed to send notification: {ex.Message}");
         }
     }
+
+    public static void PlaySound(string soundPath)
+    {
+        if (string.IsNullOrWhiteSpace(soundPath)) return;
+        try
+        {
+            var absolutePath = soundPath;
+            if (!Path.IsPathRooted(absolutePath))
+                absolutePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, absolutePath);
+
+            if (!File.Exists(absolutePath))
+            {
+                var resourceName = "Toak." + soundPath.Replace("/", ".").Replace("\\", ".");
+                using var stream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);
+                if (stream != null)
+                {
+                    absolutePath = Path.Combine(Path.GetTempPath(), "toak_" + Path.GetFileName(soundPath));
+                    if (!File.Exists(absolutePath))
+                    {
+                        using var fileStream = File.Create(absolutePath);
+                        stream.CopyTo(fileStream);
+                    }
+                }
+                else
+                {
+                    return;
+                }
+            }
+
+            var pInfo = new ProcessStartInfo
+            {
+                FileName = "paplay",
+                Arguments = $"\"{absolutePath}\"",
+                UseShellExecute = false,
+                CreateNoWindow = true
+            };
+            Process.Start(pInfo);
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"[Notifications] Failed to play sound: {ex.Message}");
+        }
+    }
 }