feat: Update card and placeholder

- Change card from njk to liquid
- Fix flag placeholder
- Update structure of card

source/screens/demo/examples/card.liquid

@@ -0,0 +1,69 @@
+---
+title: Card
+tags:
+- demoExample
+---
+{% assign pageClass = "html_card" %}
+{% layout 'hippie/simple.liquid' %}
+
+{% block body %}
+<div class="card_bkg">
+	<div id="dither"></div>
+	{% render 'hippie/partials/placeholder-flag.liquid', type: '', id: 'flag' %}
+	{% comment %}<img id="dither" src="art/flag_dither.png" width="1920" height="1200" alt="Background flag dithered"/>{% endcomment %}
+</div>
+<div class="card_box">
+	<main>
+		<p>Titel<br/>und Beschreibung</p>
+		<h1>{% text hippie.placeholders.name %}</h1>
+		<p>
+			{% link hippie.placeholders.mail, '', '', 'card_address' %}<br/>
+			{% link hippie.placeholders.domain, 'site.tld', '', 'decent' %}
+			&middot;
+			{% text hippie.placeholders.address, '', 'decent' %}</p>
+	</main>
+</div>
+{% endblock %}
+
+{% block script %}
+<script>
+	const flag = document.getElementById('flag');
+	let colors = new Array();
+	let iId = undefined;
+	let position = 0;
+
+	for (let i = 1; i <= flag.childElementCount; i++) {
+		colors.push(document.getElementById('triangle-' + i).getAttribute('fill'));
+	}
+
+	document
+		.querySelector('main')
+		.addEventListener('mouseenter', () => {
+			iId = setInterval(() => {
+				for (let i = 1; i <= colors.length; i++) {
+					position++;
+
+					if (position >= colors.length) {
+						position = 0;
+					}
+
+					document
+						.getElementById('triangle-' + i)
+						.setAttribute('fill', colors[position]);
+				}
+
+				position++;
+
+				if (position >= colors.length) {
+					position = 0;
+				}
+			}, 600);
+		});
+
+	document
+		.querySelector('main')
+		.addEventListener('mouseleave', () => {
+			iId && clearInterval(iId);
+		});
+</script>
+{% endblock %}