Address review feedback: use scoping() to check root scope and add TopLevelAwait to es-features.js

Co-authored-by: sapphi-red <49056869+sapphi-red@users.noreply.github.com>

Author: Copilot

crates/oxc_transformer/src/es2022/mod.rs

@@ -145,21 +145,8 @@ impl<'a> Traverse<'a, TransformState<'a>> for ES2022<'a, '_> {
 
 impl ES2022<'_, '_> {
     fn is_top_level_await(ctx: &TraverseCtx) -> bool {
-        use oxc_traverse::Ancestor;
-        
-        // Check if we're inside any function
-        // Top-level await means await at the module top level (not inside any function)
-        for ancestor in ctx.ancestors() {
-            match ancestor {
-                Ancestor::FunctionBody(_) | Ancestor::ArrowFunctionExpressionBody(_) => {
-                    // If inside any function, it's not top-level await
-                    return false;
-                }
-                _ => {}
-            }
-        }
-        
-        // If we didn't find any function ancestor, it's top-level await
-        true
+        // Check if the hoist scope is the root scope
+        // Top-level await means await at the module top level
+        ctx.current_hoist_scope_id() == ctx.scoping().root_scope_id()
     }
 }

tasks/compat_data/es-features.js

@@ -297,6 +297,11 @@ const es2022 = [
       // ignore "shows up in flags"
     ],
   },
+  {
+    name: 'TopLevelAwait',
+    babel: null,
+    features: [],
+  },
 ].map(f('ES2022'));
 
 const es2024 = [