feat(engine262): add verify-ask262 script and relocate verify‑ask262‑debug

- Moved `verify-ask262-debug.mts` from `scripts` to `lib-src/node`.
- Updated import to use `#self` alias.
- Added npm script `verify-ask262` to run the verification script.
- Adjusted `scripts/tsconfig.json` to include the new file location.

engine262/lib-src/node/verify-ask262-debug.mts

@@ -0,0 +1,70 @@
+#!/usr/bin/env node
+/**
+ * Verification script for ask262Debug module.
+ * Tests that the module is properly exported and captures spec section marks.
+ */
+import {
+  ask262Debug, Agent, ManagedRealm, setSurroundingAgent,
+  OrdinaryObjectCreate, CreateBuiltinFunction, CreateDataProperty, Value, skipDebugger,
+} from '#self';
+
+console.log('=== ask262Debug Verification ===\n');
+
+// 1. Check export exists
+console.log('1. Checking export...');
+if (!ask262Debug) {
+  console.error('FAIL: ask262Debug not exported');
+  process.exit(1);
+}
+console.log('   ✓ ask262Debug exported\n');
+
+// 2. Run code that hits known spec sections
+console.log('2. Executing test code...');
+const agent = new Agent();
+setSurroundingAgent(agent);
+const realm = new ManagedRealm();
+
+realm.scope(() => {
+  const debugObj = OrdinaryObjectCreate(agent.intrinsic('%Object.prototype%'));
+  skipDebugger(CreateDataProperty(realm.GlobalObject, Value('ask262Debug'), debugObj));
+
+  const startImportant = CreateBuiltinFunction(() => {
+    ask262Debug.startImportant();
+    return Value.undefined;
+  }, 0, Value('startImportant'), []);
+  skipDebugger(CreateDataProperty(debugObj, Value('startImportant'), startImportant));
+
+  const stopImportant = CreateBuiltinFunction(() => {
+    ask262Debug.stopImportant();
+    return Value.undefined;
+  }, 0, Value('stopImportant'), []);
+  skipDebugger(CreateDataProperty(debugObj, Value('stopImportant'), stopImportant));
+});
+
+realm.evaluateScript(`
+  // Array.prototype.every - should hit sec-array.prototype.every
+  ask262Debug.startImportant();
+  [1, 2, 3].every(x => x > 0);
+  ask262Debug.stopImportant();
+  
+  // Proxy creation - should hit sec-proxycreate or similar
+  new Proxy({}, {});
+`);
+
+// 3. Verify marks were captured
+console.log('3. Checking marks...');
+const marks = ask262Debug.marks;
+console.log(`   Captured ${marks.length} unique marks\n`);
+
+if (marks.length === 0) {
+  console.error('FAIL: No marks captured');
+  process.exit(1);
+}
+
+// 4. Show sample marks
+console.log('4. Sample marks:');
+marks.slice(0, 5).forEach((m, i) => {
+  console.log(`   [${i}] ${m.sectionIds.join(', ')} @ ${m.fileRelativePath}:${m.lineNumber}${m.important ? ' [important]' : ''}`);
+});
+
+console.log('=== All Checks Passed ===');