Added MimeType utility class

Author: phpdevcommunity

src/FileInfo.php

@@ -2,6 +2,8 @@
 
 namespace PhpDevCommunity\FileSystem;
 
+use PhpDevCommunity\FileSystem\Mime\MimeType;
+
 final class FileInfo
 {
     private \SplFileInfo $fileInfo;
@@ -89,6 +91,11 @@ public function getExtension(): string
         return $this->fileInfo->getExtension();
     }
 
+    public function getExtensionByMimeType():?string
+    {
+        return MimeType::getExtensionByMimeType($this->getMimeType());
+    }
+
     public function toBase64(): string
     {
         return base64_encode($this->toBinary());