refactor: Used askama_axum::Template

docs: https://djc.github.io/askama/integrations.html#axum-integration

crates/app/src/pages/cps.rs

@@ -1,10 +1,9 @@
-use askama::Template;
-use askama_axum::IntoResponse;
+use askama_axum::Template;
 
 #[derive(Template)]
 #[template(path = "pages/cps.html")]
-struct CpsResponse;
+pub struct CpsTemplate;
 
-pub async fn cps() -> impl IntoResponse {
-    CpsResponse.into_response()
+pub async fn cps() -> CpsTemplate {
+    CpsTemplate
 }