Add fzf feature

[Copilot]

Adds the fzf fuzzy finder as a devcontainer feature, building on the implementation proposed in #104.

New files

• src/fzf/devcontainer-feature.json — feature manifest with a version option (default: latest)
• src/fzf/install.sh — downloads fzf from junegunn/fzf GitHub releases; resolves latest or pinned semver, maps Debian arch to the fzf release arch naming (amd64, arm64, armv7, 386), extracts the binary to /usr/local/bin
• test/fzf/test.sh — verifies fzf --version succeeds

CI

Added fzf to both test-autogenerated and test-scenarios matrices in .github/workflows/test.yaml.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add fzf feature</issue_title>
<issue_description>build on implementation in #104 </issue_description>

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

• Fixes Add fzf feature #109

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[sebst]

tests fail

[Copilot]

tests fail

Fixed in 180f0e7. Two issues were causing the test-autogenerated jobs to fail:

1. Test check: fzf --version | grep 'fzf' was failing because recent fzf versions (v0.60+) output just the version number like 0.70.0 (unknown) without a "fzf" prefix. Changed to fzf --version.

2. Install script warning: local: version: readonly variable in github_get_tag_for_version() — set -o allexport causes the outer readonly version to be inherited by the $(...) subshell, conflicting with the local version parameter. Renamed to _version to avoid the collision.

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:

• https://api.github.com/repos/junegunn/fzf/releases/latest
  • Triggering command: /usr/bin/curl curl -s REDACTED (http 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)