Checklist

• The title of my PR follows conventional commits
• I have updated the documentation (README.md, comments, src/manpage.rs and/or src/options.rs if applicable)
• I have added unit tests
• I have added integration tests
• I have linked all related issues or PRs

Description of the changes

Note: codecov runs on the PR on this repo, but feel free to ignore it.

Summary by CodeRabbit

• New Features

  • Windows MSI/PowerShell installers, expanded release targets, Vagrant-based headless Windows test VM, and multiple named development shells.

• Documentation

  • Windows compatibility testing guide and updated contributor/README/agent docs with new workflows and examples.

• CI / Tests

  • Windows runner added; new CI test profile with higher retries while default local retries reduced; many tests now platform-gated with Windows-specific variants.

• Cross-platform behavior

  • Shell invocation, tmux handling, cursor/preview, and argument-quoting adapted for Windows.

• Chores

  • Vagrant dir ignored, flake output selected, and removal of the test-utils feature from various test/build commands.