Add NumberFormatter helper class for number formatting

- Introduced a new helper class `NumberFormatter` with a method `commaToDot` to convert numbers formatted with commas to a dot notation.
- The method also trims whitespace and removes percentage signs for cleaner data handling.

This commit enhances the application's ability to process numerical data consistently, supporting future financial data operations.

app/Helpers/NumberFormatter.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Helpers;
+
+class NumberFormatter
+{
+    public static function commaToDot($text)
+    {
+        $text = trim($text);
+        $text = str_replace(".", "", $text);
+        $text = str_replace(",", ".", $text);
+        $text = str_replace("%", "", $text);
+        return $text;
+    }
+}