refactor: move rate limiter into http layer

tests/app.rs

@@ -3,9 +3,8 @@ use axum::{
     http::{Request, StatusCode, header::HeaderName},
 };
 use pokedex_api::{
-    http::{AppState, create_app},
+    http::{AppState, RateLimiter, create_app},
     pokemon::PokeApiClient,
-    rate_limit::RateLimiter,
     service::PokedexService,
     telemetry::Telemetry,
     translation::TranslationClient,