* docs(quickstart): redesign demo-warehouse callout with sticker icons
Replaces the plain warning-style callout with a two-column layout: text
and a pill-shaped CTA on the left, a 2x2 cluster of rotated Postgres,
Metabase, dbt, and Notion sticker tiles on the right. Adds the four
connector SVGs under docs-site/public/icons/ to support it.
* chore(docs-site): refresh auto-generated next-env.d.ts
