feat: add basic htmx example

src/main.rs

@@ -1,6 +1,7 @@
 #![allow(unused)]
 #![allow(dead_code)]
 
+use axum_htmx::AutoVaryLayer;
 use compendium::{router, AppState, Error, Link, Result, Tx};
 use minijinja::{Environment, Value};
 use sqlx::postgres::PgPoolOptions;
@@ -78,6 +79,7 @@ async fn main() -> Result<()> {
     let app = router::new()
         .layer(TraceLayer::new_for_http().on_request(()))
         .layer(tx_layer)
+        .layer(AutoVaryLayer)
         .with_state(AppState::new(tmpl_env, tx_state));
 
     // Add hot reload only on dev mode