replaced askama with tera, reworked the whole website and added nixos module

templates/showcase.html

@@ -0,0 +1,12 @@
+{% extends "_layout.html" %}
+{% block content %}
+    <h1>Project Showcase</h1>
+    <p>Here are some items passed from Rust to the template:</p>
+
+    {% for item in items %}
+    <div class="card">
+        <h3>{{ item.name }}</h3>
+        <p>{{ item.description }}</p>
+    </div>
+    {% endfor %}
+{% endblock %}