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/backend/assets/js/winter.lang.js

@@ -0,0 +1,52 @@
+/*
+ * Client side translations
+ */
+
+if ($.wn === undefined)
+    $.wn = {}
+if ($.oc === undefined)
+    $.oc = $.wn
+
+if ($.wn.langMessages === undefined)
+    $.wn.langMessages = {}
+
+$.wn.lang = (function(lang, messages) {
+
+    lang.load = function(locale) {
+        if (messages[locale] === undefined) {
+            messages[locale] = {}
+        }
+
+        lang.loadedMessages = messages[locale]
+    }
+
+    lang.get = function(name, defaultValue) {
+        if (!name) return
+
+        var result = lang.loadedMessages
+
+        if (!defaultValue) defaultValue = name
+
+        $.each(name.split('.'), function(index, value) {
+            if (result[value] === undefined) {
+                result = defaultValue
+                return false
+            }
+
+            result = result[value]
+        })
+
+        return result
+    }
+
+    if (lang.locale === undefined) {
+        lang.locale = $('html').attr('lang') || 'en'
+    }
+
+    if (lang.loadedMessages === undefined) {
+        lang.load(lang.locale)
+    }
+
+    return lang
+
+})($.wn.lang || {}, $.wn.langMessages);