refactor: attempted autoupdate configuration

macos/Sources/Ghostty/Ghostty.Config.swift

@@ -360,6 +360,17 @@ extension Ghostty {
             _ = ghostty_config_get(config, &v, key, UInt(key.count))
             return v;
         }
+
+        var autoUpdates: String {
+            let defaultValue = "off"
+            guard let config = self.config else { return defaultValue }
+            let key = "auto-updates"
+            
+            var value: UnsafePointer<Int8>? = nil
+            guard ghostty_config_get(config, &value, key, UInt(key.count)) else { return defaultValue }
+            guard let pointer = value else { return defaultValue }
+            return String(cString: pointer)
+        }
     }
 }