community: publish launch article and drive adoption

[houko]

Background

pcu has ⭐10 stars and low visibility. Need to grow awareness in the pnpm community.

Tasks

• Write and publish article on dev.to (English)
• Cross-post to 掘金 (Chinese audience)
• Submit to pnpm official docs / awesome-pnpm list
• Post in pnpm GitHub Discussions
• Add to relevant awesome-* lists (awesome-nodejs, etc.)
• Create short demo GIF for README

Target

• 100+ GitHub stars within 60 days of publish
• 500+ weekly npm downloads