Add deploy-site and deploy-explore make targets, fix CLAUDE.md hosting docs
CLAUDE.md still said GitHub Pages auto-deploys — corrected to document
the Cloudflare Workers deployment (site/ and explore/ directories).
Root Makefile now has deploy-site and deploy-explore targets that
delegate to the respective wrangler.toml configs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>