feat: add caching to loader

.gitignore

@@ -1,8 +1,10 @@
 .idea/*
 .vscode/*
+.serena
 *.out
 *.test
 .DS_Store
 pkg/parser/testdata/lotto.graphql
 *node_modules*
-*vendor*
+*vendor*
+docs/superpowers/

AGENTS.md

@@ -0,0 +1 @@
+CLAUDE.md

README.md

@@ -647,7 +647,7 @@ func ExampleExecuteOperation() {
   switch p := preparedPlan.(type) {
   case *plan.SynchronousResponsePlan:
     out := &bytes.Buffer{}
-    err, _ := resolver.ResolveGraphQLResponse(ctx, p.Response, nil, out)
+    _, err := resolver.ResolveGraphQLResponse(ctx, p.Response, out)
     if err != nil {
       panic(err)
     }