refactor: replace custom CRM with Monica fork

app/Exceptions/FileNotFoundException.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Exceptions;
+
+use Illuminate\Contracts\Filesystem\FileNotFoundException as FileNotFoundExceptionBase;
+
+class FileNotFoundException extends FileNotFoundExceptionBase
+{
+    /**
+     * @var string
+     */
+    public $fileName;
+
+    /**
+     * Create a new instance.
+     *
+     * @param  string  $fileName
+     * @return void
+     */
+    public function __construct($fileName)
+    {
+        $this->fileName = $fileName;
+        parent::__construct();
+    }
+
+    public function __toString(): string
+    {
+        return 'File not found: '.$this->fileName;
+    }
+}