feat: Update portal

- Change portal from njk to liquid
- Add gate partials as replacement for macro

source/screens/demo/examples/portal.liquid

@@ -0,0 +1,29 @@
+---
+title: Portal
+tags:
+- demoExample
+image:
+  src: '/art/flag_websafe_128x80.gif'
+  alt: 'Flag of Interaktionsweise'
+links:
+- name: '1'
+  href: 'http://domain.tld'
+  img: '/art/bullet.gif'
+- name: 'Zwei'
+  href: 'http://domain.tld'
+  img: '/art/bullet.gif'
+---
+{% assign bodyClass = "body_portal" %}
+{% layout 'hippie/simple.liquid' %}
+
+{% block body %}
+<div class="portal">
+	{% render 'hippie/partials/gate-list',
+		name: 'Tor mit Symbol und Liste',
+		url: '../demo',
+		image: image,
+		links: links
+	%}
+	{% render 'hippie/partials/gate-simple', name: 'Tor', url: '../demo' %}
+</div>
+{% endblock %}