Simplify quickstart guide

[mintlify]

Streamlined the quickstart page to focus on essential steps for getting started quickly. Removed detailed repository choice explanations, deployment tabs, screenshots, and next steps section to reduce cognitive load for new users.

Files changed

• quickstart.mdx - Condensed from detailed multi-tab guide to simple two-section quickstart

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Note

Rewrites quickstart to a short 3-step deploy flow and simplified first-edit instructions, removing tabs, repository choice details, and extras.

• Docs (quickstart.mdx):
  • Deploy flow: Replace multi-tab, repository-choice guide with a single 3-step sequence; remove cards/tabs, GitHub App/setup specifics, screenshots, and tips/info.
  • Editing flow: Simplify "Make your first change" into concise steps and copy.
  • Copy/structure: Update headings (e.g., "Deploy your site", "Make your first edit") and intro sentence.

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