test(amazonq): add mock for IntersectionObserver

Author: avi-alpert

packages/amazonq/test/e2e/amazonq/framework/jsdomInjector.ts

@@ -48,3 +48,16 @@ export function injectJSDOM() {
     // jsdom doesn't have support for structuredClone. See https://github.com/jsdom/jsdom/issues/3363
     global.structuredClone = (val: any) => JSON.parse(JSON.stringify(val))
 }
+
+global.IntersectionObserver = class IntersectionObserver {
+    observe() {}
+    unobserve() {}
+    disconnect() {}
+    takeRecords() {
+        return []
+    }
+    // eslint-disable-next-line unicorn/no-null
+    root = null
+    rootMargin = ''
+    thresholds = []
+}