feat: replace text/template with templ and refactor code

views/error.templ

@@ -0,0 +1,12 @@
+package views
+
+import "strconv"
+
+templ ErrorPage(code int, display string) {
+	@layout("Error - dumb") {
+		<div id="error">
+			<h1>{ strconv.Itoa(code) }</h1>
+			<p>{ display }</p>
+		</div>
+	}
+}