visual tests

[gingerwizard]

Summary

Adds visual testing using playwright and argo. We have to upgrade some packages for docusaurus to make this work, moving to the latest v2 as well as node v20 LTS. From what i can tell this works - moving forward, we wont have this uncertainty!

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/docusaurus.config.js
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/en/integrations/index.mdx