Add GitHub Actions workflow for Ansible playbook validation

[michaelbarton]

Summary

This PR adds CI/CD automation for validating the Ansible playbook and refactors the Neovim npm package installation to use a more portable approach.

Key Changes

• New GitHub Actions workflow (.github/workflows/ansible.yml):

  • Automatically runs on every push to validate the Ansible playbook
  • Sets up the required environment (Python 3.11, Neovim, uv package manager)
  • Creates necessary stub files and directories excluded from version control
  • Performs syntax validation of the playbook
  • Executes the playbook with macOS-specific tasks skipped for Linux CI environment

• Refactored Neovim npm package installation (ansible/tasks/neovim.yml):

  • Replaced community.general.npm module with ansible.builtin.command for better portability
  • Uses explicit npm install command with --prefix flag instead of module-specific parameters
  • Maintains the same functionality while reducing external module dependencies

Implementation Details

The workflow creates a complete dotfiles environment in CI by:

• Symlinking the repository to ~/.dotfiles
• Creating stub files for .mise.toml and SSH config (excluded from version control)
• Installing all required tools (Python, Neovim, Ansible via uv)
• Running both syntax validation and actual playbook execution

The npm installation change improves compatibility across different Ansible versions and environments by using the standard npm CLI directly.

https://claude.ai/code/session_01Vm5EEsQ5uFKoni6qWEDQd8