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/cms/twig/PlaceholderNode.php

@@ -0,0 +1,83 @@
+<?php namespace Cms\Twig;
+
+use Twig\Node\Node as TwigNode;
+use Twig\Compiler as TwigCompiler;
+
+/**
+ * Represents a placeholder node
+ *
+ * @package winter\wn-cms-module
+ * @author Alexey Bobkov, Samuel Georges
+ */
+class PlaceholderNode extends TwigNode
+{
+    public function __construct($name, $paramValues, $body, $lineno, $tag = 'placeholder')
+    {
+        $nodes = [];
+
+        if ($body) {
+            $nodes['default'] = $body;
+        }
+
+        $attributes = $paramValues;
+        $attributes['name'] = $name;
+
+        parent::__construct($nodes, $attributes, $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param TwigCompiler $compiler A TwigCompiler instance
+     */
+    public function compile(TwigCompiler $compiler)
+    {
+        $hasBody = $this->hasNode('default');
+        $varId = '__placeholder_'.$this->getAttribute('name').'_default_contents';
+        $compiler
+            ->addDebugInfo($this)
+            ->write("\$context[")
+            ->raw("'".$varId."'")
+            ->raw("] = null;");
+
+        if ($hasBody) {
+            $compiler
+                ->addDebugInfo($this)
+                ->write('ob_start();')
+                ->subcompile($this->getNode('default'))
+                ->write("\$context[")
+                ->raw("'".$varId."'")
+                ->raw("] = ob_get_clean();");
+        }
+
+        $isText = $this->hasAttribute('type') && $this->getAttribute('type') == 'text';
+
+        $compiler->addDebugInfo($this);
+        if (!$isText) {
+            $compiler->write("echo \$this->env->getExtension('Cms\Twig\Extension')->displayBlock(");
+        }
+        else {
+            $compiler->write("echo twig_escape_filter(\$this->env, \$this->env->getExtension('Cms\Twig\Extension')->displayBlock(");
+        }
+
+        $compiler
+            ->raw("'".$this->getAttribute('name')."', ")
+            ->raw("\$context[")
+            ->raw("'".$varId."'")
+            ->raw("]")
+            ->raw(")");
+
+        if (!$isText) {
+            $compiler->raw(";\n");
+        }
+        else {
+            $compiler->raw(");\n");
+        }
+
+        $compiler
+            ->addDebugInfo($this)
+            ->write("unset(\$context[")
+            ->raw("'".$varId."'")
+            ->raw("]);");
+    }
+}