chore: retire GitHub Pages deploy workflow (#26)

The Hugo site now deploys via Vercel's Git integration. Custom domain
cf-purge.app DNS has been flipped from GitHub Pages to Vercel, so the
gh-pages.yml workflow is no longer authoritative.

chore: add Vercel deployment config (#25)

Adds website/vercel.json so Vercel's Git integration can build the
Hugo + Tailwind site from the website/ subdirectory. Keeps the existing
gh-pages.yml workflow in place until DNS cutover; cf-purge.app continues
to be served from GitHub Pages during Vercel verification.

chore: Update CI for new custom domain

Merge pull request #22 from Dzhuneyt/cursor/analyze-and-suggest-readm…

…e-improvements-65c9

Analyze and suggest README improvements

ci: Debug failing Go release

ci: Debug failing Go release

ci: Debug failing Go release

chore: Fix hardcoded URLs. Replace with Hugo relative URLs pipe

chore: Fix hardcoded URLs. Replace with Hugo relative URLs pipe

chore: Fix hardcoded URLs. Replace with Hugo relative URLs pipe