feat: VivesPOS landing on Winter CMS 1.2 — theme + plugin + Dockerfile

- Base: wintercms/winter branch 1.2 (full framework)
- Theme vivespos: Canvas 7 + Bootstrap 5 CDN, custom CSS
- Layout: deferred GTM/GA4 tracking, JSON-LD SoftwareApplication
- Partials: hero (offline-first), features, modes (offline/nube toggle),
  screenshots, pricing (3 planes), comparison, FAQ, CTA
- Plugin VivesPOS.Site with ContactForm
- Dockerfile: PHP 8.2 Apache, port 80, healthcheck
- Added winter/wn-pages, blog, sitemap, seo plugins
- Active theme set to vivespos

modules/system/twig/Loader.php

@@ -0,0 +1,103 @@
+<?php namespace System\Twig;
+
+use App;
+use Exception;
+use File;
+use InvalidArgumentException;
+use Twig\Source as TwigSource;
+use Twig\Error\LoaderError;
+use Twig\Loader\LoaderInterface as TwigLoaderInterface;
+use Winter\Storm\Support\Str;
+
+/**
+ * This class implements a Twig template loader for the core system and backend.
+ *
+ * @package winter\wn-system-module
+ * @author Alexey Bobkov, Samuel Georges
+ */
+class Loader implements TwigLoaderInterface
+{
+    /**
+     * @var bool Allow any local file
+     */
+    public static $allowInclude = false;
+
+    /**
+     * @var array Cache
+     */
+    protected $cache = [];
+
+    /**
+     * Gets the path of a view file.
+     */
+    protected function findTemplate(string $name): string
+    {
+        $finder = App::make('view')->getFinder();
+
+        if (isset($this->cache[$name])) {
+            return $this->cache[$name];
+        }
+
+        if (static::$allowInclude === true && File::isFile($name)) {
+            return $this->cache[$name] = $name;
+        }
+
+        try {
+            $path = $finder->find($name);
+        } catch (InvalidArgumentException $ex) {
+            if (Str::contains($ex->getMessage(), 'not found')) {
+                throw new LoaderError($ex->getMessage());
+            }
+            throw $ex;
+        }
+
+        return $this->cache[$name] = $path;
+    }
+
+    /**
+     * Returns the Twig content string.
+     * This step is cached internally by Twig.
+     */
+    public function getSourceContext(string $name): TwigSource
+    {
+        return new TwigSource(File::get($this->findTemplate($name)), $name);
+    }
+
+    /**
+     * Returns the Twig cache key.
+     */
+    public function getCacheKey(string $name): string
+    {
+        return $this->findTemplate($name);
+    }
+
+    /**
+     * Determines if the content is fresh.
+     */
+    public function isFresh(string $name, int $time): bool
+    {
+        return File::lastModified($this->findTemplate($name)) <= $time;
+    }
+
+    /**
+     * Returns the file name of the loaded template.
+     */
+    public function getFilename(string $name): string
+    {
+        return $this->findTemplate($name);
+    }
+
+    /**
+     * Checks that the template exists.
+     */
+    public function exists(string $name): bool
+    {
+        try {
+            $this->findTemplate($name);
+            return true;
+        }
+        catch (Exception $exception) {
+            return false;
+        }
+    }
+}