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/pages.json

@@ -0,0 +1,3 @@
+{
+	"tags": "demoPage"
+}