Update Estuary integration docs with new connector

[aeluce]

Summary

Estuary now offers a materialization connector to ClickHouse that uses the native protocol and format. This PR updates docs to include the alternate option and provides an overview page to collect both options under a new sub-section.

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/integrations/index.mdx

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