Added audio recording (#615)

app/MindWork AI Studio/Tools/MIME/AudioBuilder.cs

@@ -0,0 +1,51 @@
+namespace AIStudio.Tools.MIME;
+
+public class AudioBuilder : ISubtype
+{
+    private const BaseType BASE_TYPE = BaseType.AUDIO;
+
+    private AudioBuilder()
+    {
+    }
+
+    public static AudioBuilder Create() => new();
+
+    private AudioSubtype subtype;
+
+    public AudioBuilder UseSubtype(string subType)
+    {
+        this.subtype = subType.ToLowerInvariant() switch
+        {
+            "mpeg" => AudioSubtype.MPEG,
+            "wav" => AudioSubtype.WAV,
+            "ogg" => AudioSubtype.OGG,
+            "aac" => AudioSubtype.AAC,
+            "flac" => AudioSubtype.FLAC,
+            "webm" => AudioSubtype.WEBM,
+            "mp4" => AudioSubtype.MP4,
+            "mp3" => AudioSubtype.MP3,
+            "m4a" => AudioSubtype.M4A,
+            "aiff" => AudioSubtype.AIFF,
+            
+            _ => throw new ArgumentException("Unsupported MIME audio subtype.", nameof(subType))
+        };
+        
+        return this;
+    }
+
+    public AudioBuilder UseSubtype(AudioSubtype subType)
+    {
+        this.subtype = subType;
+        return this;
+    }
+    
+    #region Implementation of IMIMESubtype
+
+    public MIMEType Build() => new()
+    {
+        Type = this,
+        TextRepresentation = $"{BASE_TYPE}/{this.subtype}".ToLowerInvariant()
+    };
+
+    #endregion
+}