Moved all extension methods into extension blocks (#1155)

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

@@ -2,14 +2,17 @@ namespace AIStudio.Tools.MIME;
 
 public static class MIMETypeExtensions
 {
-    public static string[] ToStringArray(this MIMEType[] mimeTypes)
+    extension(MIMEType[] mimeTypes)
     {
-        var result = new string[mimeTypes.Length];
-        for (var i = 0; i < mimeTypes.Length; i++)
+        public string[] ToStringArray()
         {
-            result[i] = mimeTypes[i];
-        }
+            var result = new string[mimeTypes.Length];
+            for (var i = 0; i < mimeTypes.Length; i++)
+            {
+                result[i] = mimeTypes[i];
+            }
         
-        return result;
+            return result;
+        }
     }
 }