feat: Add new route interceptor features

[florian-cronn]

Adds a new API which can be used to intercept network requests in playwright using the page.route functionality.

The utilities introduced by this pull request add methods which scope route interceptors for the duration of a callback, to allow temporary and focused request manipulation.

Example:

await interceptRoute(page, pathPattern("/api/users/1"))
  .respondWith({ status: 404 })
  .during(async () => {
    await page.goto("/users/1/profile");
    await expect(page.getByRole("heading", { level: 1 })).toHaveText(
      "Unknown user",
    );
  });

[changeset-bot]

🦋 Changeset detected

Latest commit: 83d03e9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@cronn/playwright-utils	Minor

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