chore: copy ep_products and ep_theme from EP/website@9593cc8

Copied unchanged from public/typo3conf/ext/ of EP/website at
9593cc8631354f8a363d6609de8b7433f669a9a0 (Git-tracked files only).
History stays in the old repository. Only composer.json files are
added so the extensions install as path packages.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/ep_theme/Classes/ViewHelpers/Stimulus/AbstractStimulusViewHelper.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace EP\EpTheme\ViewHelpers\Stimulus;
+
+use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
+
+/**
+ * This code is adapted from the Symfony WebpackEncoreBundle package.
+ * (c) Fabien Potencier <[email protected]>
+ */
+class AbstractStimulusViewHelper extends AbstractViewHelper
+{
+    /**
+     * This method is taken from symfony/webpack-encore-bundle
+     *
+     * Normalize a Stimulus controller name into its HTML equivalent (no special character and / becomes --).
+     *
+     * @see https://stimulus.hotwire.dev/reference/controllers
+     */
+    protected static function normalizeControllerName(string $str): string
+    {
+        return preg_replace('/^@/', '', str_replace('_', '-', str_replace('/', '--', $str)));
+    }
+
+    /**
+     * This method is taken from symfony/webpack-encore-bundle
+     *
+     * Normalize a Stimulus Value API key into its HTML equivalent ("kebab case").
+     * Backport features from symfony/string.
+     *
+     * @see https://stimulus.hotwire.dev/reference/values
+     */
+    protected static function normalizeKeyName(string $str): string
+    {
+        // Adapted from ByteString::camel
+        $str = ucfirst(str_replace(' ', '', ucwords(preg_replace('/[^a-zA-Z0-9\x7f-\xff]++/', ' ', $str))));
+
+        // Adapted from ByteString::snake
+        return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], '\1-\2', $str));
+    }
+}