refactor(e2e): prendre les types navigateur chez les helpers plutôt que chez playwright

packages/polyfill/e2e/notebook.ts

@@ -28,7 +28,6 @@
  * can circulate.
  */
 
-import { type BrowserContext, type Frame, type Page } from "playwright";
 import { execSync } from "node:child_process";
 import * as fs from "node:fs";
 import * as os from "node:os";
@@ -55,7 +54,10 @@ import {
   serveOnEphemeralPort,
   setupBrokerPage,
   within,
+  type BrowserContext,
+  type Frame,
   type JourneyDeclaration,
+  type Page,
   type Prerequisite,
   type RunProfile,
 } from "ng-e2e-helpers";