feature: options method

src/http/handle_xrpc_resolve_handle.rs

···
 
     Ok(response)
 }
+
+pub(super) async fn handle_xrpc_resolve_handle_options() -> Response {
+    let mut response = StatusCode::NO_CONTENT.into_response();
+    let headers = response.headers_mut();
+    
+    // Add CORS and Allow headers for OPTIONS request
+    headers.insert("Allow", HeaderValue::from_static("GET, HEAD, OPTIONS"));
+    headers.insert(
+        header::ACCESS_CONTROL_ALLOW_HEADERS,
+        HeaderValue::from_static("*"),
+    );
+    headers.insert(
+        header::ACCESS_CONTROL_ALLOW_METHODS,
+        HeaderValue::from_static("GET, HEAD, OPTIONS"),
+    );
+    headers.insert(
+        header::ACCESS_CONTROL_ALLOW_ORIGIN,
+        HeaderValue::from_static("*"),
+    );
+    headers.insert(
+        header::ACCESS_CONTROL_EXPOSE_HEADERS,
+        HeaderValue::from_static("*"),
+    );
+    headers.insert(
+        header::ACCESS_CONTROL_MAX_AGE,
+        HeaderValue::from_static("86400"),
+    );
+    headers.insert(
+        "Access-Control-Request-Headers",
+        HeaderValue::from_static("*"),
+    );
+    headers.insert(
+        "Access-Control-Request-Method",
+        HeaderValue::from_static("GET"),
+    );
+    
+    response
+}

src/http/server.rs

···
         .route("/xrpc/_health", get(handle_xrpc_health))
         .route(
             "/xrpc/com.atproto.identity.resolveHandle",
-            get(super::handle_xrpc_resolve_handle::handle_xrpc_resolve_handle),
+            get(super::handle_xrpc_resolve_handle::handle_xrpc_resolve_handle)
+                .options(super::handle_xrpc_resolve_handle::handle_xrpc_resolve_handle_options),
         )
         .with_state(app_context)
 }