feat: Restructure styles for cli and new pages

- Remove header from cli
- Add body_cli class
- Remove unnecessary frame element

source/screens/demo/examples/ui/cli.njk

@@ -4,7 +4,7 @@ tags:
 	- ui
 ---
 {% set pageId = page.fileSlug %}
-{% set bodyClass = "body_frame" %}
+{% set bodyClass = "body_cli" %}
 
 {% extends "hippie/_app.njk" %}
 {% import "hippie/macros/_io.njk" as io %}
@@ -23,7 +23,6 @@ tags:
 {% endblock %}
 
 {% block body %}
-	{{ io.frameHeader('title-bar') }}
 	<div id="cli">
 		<div id="history">
 			<pre>Previous prompt</pre>