GitHub Actions 8ef033d5a9 docs: rewrite features.md and add DNS challenge documentation ...

Complete documentation overhaul for DNS Challenge Support feature (PR #461):

Rewrite features.md as marketing overview (87% reduction: 1,952 → 249 lines)
Organize features into 8 logical categories with "Learn More" links
Add comprehensive dns-challenge.md with:
15+ supported DNS providers (Cloudflare, Route53, DigitalOcean, etc.)
Step-by-step setup guides
Provider-specific configuration
Manual DNS challenge workflow
Troubleshooting section
Create 18 feature documentation stub pages
Update README.md with DNS Challenge in Top Features section
Refs: #21, #461

2026-01-15 02:19:37 +00:00

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