feat: Replace blank screen with liquid version

- Add title to full template
- Remove unnecessary title from screens
- Change CRLF to LF

source/screens/demo/pages/default.liquid

@@ -1,5 +1,5 @@
 ---
-title: "Default"
+title: Default
 ---
 {% assign pageBase = "../" -%}
 {% assign pageId = page.fileSlug -%}