Add CI workflow to validate chezmoi configuration

[Copilot]

Adds automated validation of chezmoi dotfiles configuration on every push and PR.

Changes

• .github/workflows/ci.yml: GitHub Actions workflow that validates chezmoi templates and configuration
  • Installs chezmoi in clean Ubuntu environment
  • Provisions test configuration with all required template variables
  • Runs chezmoi apply --dry-run --verbose to validate template rendering
  • Verifies data variables with chezmoi data
  • Uses minimal permissions (contents: read)

Validation approach

The workflow catches template syntax errors, undefined variables, and malformed configurations before merge by attempting to render all templates in dry-run mode against a complete test dataset.

# Test data includes all variables used in templates
[data]
    name = "CI Test User"
    email = "ci@example.com"
    editor = "vim"
    installZsh = false
    installPython = false
    # ... all other template variables

Workflow triggers on push to main, pull_request to main, and manual workflow_dispatch.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• get.chezmoi.io
  • Triggering command: /usr/bin/curl curl -fsLS get.chezmoi.io (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>CI</issue_title>
<issue_description>I'd like to have github ci setup for this repo. I want to automatically check if chozmoi configuration is correct. </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes CI #4

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