test(e2e): add Playwright coverage for Collection Docs pagination and navigation

[lokesh-bruno]

Ref BRU-4674

Description

Adds E2E coverage for Collection Docs pagination and navigation in routing.spec.ts. The tests use the existing ?fixture=folders collection. No new fixture was added.

TC-5218 and TC-5219 stay manual. They reorder a request or move it to another folder in Bruno and then regenerate the docs. The suite checks the current folders collection only.

The coverage includes:

• Next and Previous updating the page and the address-bar hash, with exactly one active sidebar item.
• The first page showing only Next, and the last page showing only Previous, with the neighbor page name on the control.
• The Overview hash being empty or exactly #/.
• Editing the hash moving to that page without a full reload, with the sidebar highlight following.
• Browser Back and Forward keeping the URL, page content, and sidebar highlight together.
• Three rapid Next clicks landing on the last target, with the hash and sidebar highlight in sync.
• A distant sidebar jump after Next showing only that page.
• Next and Previous staying fully inside the viewport at desktop (1280), tablet (768), and mobile (375), with no horizontal overflow.

[changeset-bot]

🦋 Changeset detected

Latest commit: 6122ad5

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