Added a configurable Opus bitrate for audio transcription

app/MindWork AI Studio/Settings/ConfigurationSelectDataFactory.cs

@@ -323,4 +323,10 @@ public static class ConfigurationSelectDataFactory
             yield return new(level.GetName(), level);
         }
     }
+
+    public static IEnumerable<ConfigurationSelectData<TranscriptionOpusBitrate>> GetTranscriptionOpusBitrateData()
+    {
+        foreach (var bitrate in Enum.GetValues<TranscriptionOpusBitrate>())
+            yield return new(bitrate.GetName(), bitrate);
+    }
 }