Add vercel.json to deploy docs/ as the static site root

[magi8101]

Summary

• Adds a minimal vercel.json at the repo root telling Vercel to serve docs/ directly as the output directory.
• No build command needed - the docs site (docs/index.html, styles.css, script.js, from PR Rewrite docs site UI: fix mobile overflow, polish visual design #19) is plain static HTML/CSS/JS with no build step, so Vercel just copies the directory as-is.

Test plan

• vercel.json is a static output-directory config only - nothing to run locally to verify beyond reviewing the file

Summary by CodeRabbit

• Chores
  • Configured deployments to serve the built documentation from the docs directory.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: bb5eff8e-0e8b-4663-a1f5-8f6e23f9fdc0

📥 Commits

Reviewing files that changed from the base of the PR and between f9c4a6d and c52f243.

📒 Files selected for processing (1)

• vercel.json

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📝 Walkthrough

Walkthrough

The pull request adds vercel.json and sets Vercel’s outputDirectory to docs.

Changes

Vercel documentation deployment

Layer / File(s)	Summary
Configure documentation output directory vercel.json	Vercel now uses the docs directory as its output directory.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Feature

Merge Risk: ⚪ Minimal · up to c52f2

The configuration can serve the existing documentation site without a build step; no concrete deployment defect is established.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding vercel.json to deploy the docs/ directory as the static site root.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

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