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/classes/theme/fields.yaml

@@ -0,0 +1,58 @@
+# ===================================
+#  Form Field Definitions
+# ===================================
+
+tabs:
+    defaultTab: cms::lang.theme.default_tab
+    fields:
+
+        name:
+            label: cms::lang.theme.name_label
+            placeholder: cms::lang.theme.name_create_placeholder
+            span: auto
+            required: true
+            attributes:
+                default-focus: 1
+
+        dir_name@create:
+            label: cms::lang.theme.dir_name_label
+            placeholder: cms::lang.theme.dir_name_create_label
+            span: auto
+            preset: name
+            required: true
+
+        dir_name@update:
+            label: cms::lang.theme.dir_name_label
+            disabled: true
+            span: auto
+
+        scaffold@create:
+            label: cms::lang.theme.scaffold.label
+            type: balloon-selector
+            span: full
+            required: true
+            options:
+                empty: cms::lang.theme.scaffold.empty
+                less: cms::lang.theme.scaffold.less
+                tailwind: cms::lang.theme.scaffold.tailwind
+            default: less
+
+        description:
+            label: cms::lang.theme.description_label
+            placeholder: cms::lang.theme.description_placeholder
+            type: textarea
+            size: tiny
+
+        author:
+            label: cms::lang.theme.author_label
+            placeholder: cms::lang.theme.author_placeholder
+            span: auto
+
+        homepage:
+            label: cms::lang.theme.homepage_label
+            placeholder: cms::lang.theme.homepage_placeholder
+            span: auto
+
+        code:
+            label: cms::lang.theme.code_label
+            placeholder: cms::lang.theme.code_placeholder