Added audio recording (#615)

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

@@ -0,0 +1,48 @@
+namespace AIStudio.Tools.MIME;
+
+public class ImageBuilder : ISubtype
+{
+    private const BaseType BASE_TYPE = BaseType.IMAGE;
+
+    private ImageBuilder()
+    {
+    }
+
+    public static ImageBuilder Create() => new();
+
+    private ImageSubtype subtype;
+
+    public ImageBuilder UseSubtype(string subType)
+    {
+        this.subtype = subType.ToLowerInvariant() switch
+        {
+            "jpeg" or "jpg" => ImageSubtype.JPEG,
+            "png" => ImageSubtype.PNG,
+            "gif" => ImageSubtype.GIF,
+            "webp" => ImageSubtype.WEBP,
+            "tiff" or "tif" => ImageSubtype.TIFF,
+            "svg+xml" or "svg" => ImageSubtype.SVG,
+            "heic" => ImageSubtype.HEIC,
+            
+            _ => throw new ArgumentException("Unsupported MIME image subtype.", nameof(subType))
+        };
+
+        return this;
+    }
+
+    public ImageBuilder UseSubtype(ImageSubtype subType)
+    {
+        this.subtype = subType;
+        return this;
+    }
+    
+    #region Implementation of IMIMESubtype
+
+    public MIMEType Build() => new()
+    {
+        Type = this,
+        TextRepresentation = $"{BASE_TYPE}/{this.subtype}".ToLowerInvariant()
+    };
+
+    #endregion
+}