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/screens/demo/pages/default.liquid

@@ -1,13 +0,0 @@
----
-title: Default
----
-{% assign pageId = page.fileSlug -%}
-{% assign pageClass = 'default' -%}
-{% assign bodyClass = 'default' -%}
-{% layout 'hippie/default.liquid' %}
-
-{% block title %}{{ title }}{% endblock %}
-
-{% block body %}
-<!-- {{ title }} body -->
-{% endblock %}