feat: Change file structure

- Move return object to named export for 11ty config
- screens is now view
- 11ty data files moved to view/_data
- templates is now view/_includes
- Both are the default directories
- data is now used as intended, for user data
- Update index to reflect filenames and structure

source/view/demo/pages/maintenance.liquid

@@ -0,0 +1,12 @@
+---
+title: Maintenance
+---
+{% assign pageClass = 'h_full_view' -%}
+{% layout 'hippie/status.liquid' %}
+
+{% block body %}
+<hgroup id="root" class="txt_center">
+	<h1 class="txt_hero txt_gradient">HIPPIE</h1>
+	<p>Diese Seite wird gerade gewartet.</p>
+</hgroup>
+{% endblock %}