allow FileSizeUnit selection from String

Co-authored-by: Michal Sniatala <[email protected]>

Author: ThomasMeschke

system/Files/FileSizeUnit.php

@@ -20,4 +20,16 @@ enum FileSizeUnit: int
     case MB = 2;
     case GB = 3;
     case TB = 4;
+
+    public static function fromString(string $unit): self
+    {
+        return match (strtolower($unit)) {
+            'b'  => self::B,
+            'kb' => self::KB,
+            'mb' => self::MB,
+            'gb' => self::GB,
+            'tb' => self::TB,
+            default => throw new InvalidArgumentException("Invalid unit: $unit"),
+        };
+    }
 }