Add Sheet upload function

src/Exception/SpreadsheetDataException.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Exception;
+
+class SpreadsheetDataException extends SpreadsheetException
+{
+    /** @param list<string> $errors */
+    public function __construct(
+        public readonly array $errors,
+        string $message = '',
+        int $code = 0,
+        ?\Throwable $previous = null,
+    ) {
+        parent::__construct($message, $code, $previous);
+    }
+}

src/Exception/SpreadsheetException.php

@@ -0,0 +1,7 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Exception;
+
+class SpreadsheetException extends \Exception {}