feat: Separated install process + autoloader. First approach

autoloader.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * Simple autoloader, so we don't need Composer just for this.
+ */
+class Autoloader
+{
+    public static function register()
+    {
+        spl_autoload_register(function ($class) {
+            $className = str_replace('PrestaShop\\Module\\Doofinder\\', '', $class);
+            $file = _PS_MODULE_DIR_ . 'doofinder/' . self::uncapitalize(str_replace('\\', DIRECTORY_SEPARATOR, $className) . '.php');
+            if (file_exists($file)) {
+                require_once $file;
+
+                return true;
+            } elseif (file_exists(self::pascalCaseToSnakeCase($file))) {
+                $file = self::pascalCaseToSnakeCase($file);
+                require_once $file;
+
+                return true;
+            }
+
+            return false;
+        });
+    }
+
+    private static function pascalCaseToSnakeCase($path)
+    {
+        $parts = explode('/', $path);
+        $filename = array_pop($parts);
+        // Separate PascalCase words and convert to snake_case without the leading empty element.
+        $snakeCase = strtolower(ltrim(implode('_', preg_split('/(?=[A-Z])/', basename($filename, '.php'))), '_'));
+
+        return implode('/', $parts) . '/' . $snakeCase . '.php';
+    }
+
+    private static function uncapitalize($text)
+    {
+        return strtolower($text[0]) . substr($text, 1);
+    }
+}
+Autoloader::register();