v0.11.1

What changed

• Add appbun showcase <recipe|url> for share-ready README, release, and social cards.
• Add automatic Built with appbun and Build this app badges to generated project READMEs.
• Put rebuild and appbun badge commands directly in generated READMEs.
• Add Build this app buttons across the gallery, plus a Community builds section.
• Add an "I built an app with appbun" issue form and workflow that opens a gallery-card PR.
• Move the Codex/Claude Code agent prompt and MCP path closer to the README top.

Verified

• bun run check
• bun run test
• npm pack --dry-run
• node bin/appbun.js --version
• node bin/appbun.js showcase chatgpt
• scaffold smoke for generated README sharing loop
• gallery page generation smoke
• community gallery JSON script smoke in /tmp