[frdmn]

Summary

Replaces the npm Ansible role with a bun role for installing global Node CLIs.

• roles/npm → roles/bun: bun add --global --trust per package, idempotent via creates: ~/.bun/install/global/node_modules/<pkg> (same pattern as the uv role), plus a bun update --global upgrade task
• npm_packages → bun_packages; dropped bower, giracli, init.js, added opencode-ai and playwright
• bun added to brew_packages (replaces the curl installer)
• zshenv: export BUN_INSTALL and add $BUN_INSTALL/bin to PATH
• README updated

Why not pnpm

community.general.pnpm can't detect global installs on pnpm >= 11 (no global pnpm-lock.yaml anymore), so it reinstalls on every run. Without the module, bun is simpler: a stable global path makes creates: work, so no list/parse task is needed.

Notes

• Node (nodejs in brew) is still required: the CLIs use #!/usr/bin/env node shebangs.
• --trust lets packages with postinstall scripts (e.g. opencode-ai) run them; bun records them in the global trustedDependencies.

Test plan

• yamllint . and ansible-lint pass
• ansible-playbook dotfiles.yml --tags bun installs all packages; second run reports changed=0
• opencode, json, playwright run from ~/.bun/bin