refactor: update index views to use new nebula components

internal/nebula/layout/container.templ

@@ -0,0 +1,24 @@
+package layout
+
+// Columns is a component that renders a responsive flex container that stacks on mobile
+templ Columns() {
+	<div class="flex flex-col h-full w-full gap-4 md:gap-6 md:flex-row md:flex-wrap">
+		{ children... }
+	</div>
+}
+
+// Rows is a component that renders a responsive flex container that wraps on mobile
+templ Rows() {
+	<div class="flex flex-col w-full gap-3 sm:flex-row sm:flex-wrap sm:gap-4">
+		{ children... }
+	</div>
+}
+
+templ Separator(text string) {
+	<div class="relative py-6">
+		<div class="absolute inset-0 flex items-center"><span class="w-full border-t"></span></div>
+		<div class="relative flex justify-center text-xs uppercase">
+			<span class="px-2 text-neutral-500">{ text }</span>
+		</div>
+	</div>
+}