refactor: update index views to use new nebula components

internal/nebula/nav/footer.templ

@@ -0,0 +1,10 @@
+package nav
+
+templ Footer() {
+	<footer class="flex items-center justify-center w-full h-16 bg-gradient-to-r from-cyan-700 to-cyan-300 px-4 py-2 rounded-xl">
+		<div class="flex items-center gap-3">
+			<sl-icon library="sonr" name="sonr-fill" class="w-8 h-8"></sl-icon>
+			<h1 class="text-white text-2xl font-bold">Sonr.ID</h1>
+		</div>
+	</footer>
+}