Publish arcanea-code to npm as installable CLI

[frankxai]

Goal

npm install -g arcanea-code or npx arcanea-code

Tasks

• Update package.json: name, bin, description
• Set up npm org scope (@arcanea/code or arcanea-code)
• Multi-platform binary publishing (like opencode)
• Verify npx arcanea-code works end-to-end
• Homebrew formula
• Scoop manifest (Windows)

[frankxai]

npm publish workflow created (.github/workflows/npm-publish.yml). npx entry point ready. Awaiting NPM_TOKEN secret configuration to publish.