v4.0.0

Added:

• 🧪 Add ubuntu-26.04 and ubuntu-26.04-arm preview runners to the test matrix
• 🧪 Add ubuntu-24.04 and ubuntu-22.04-arm to the test matrices
• 🌐 Add GitHub Pages dashboard to visualise CI test results (concept by Fabian Rost)
• 🖼️ Add live dashboard screenshot to README, replacing the manually maintained size tables
• 🔒 Declare minimal workflow permissions to resolve code-scanning alerts
• 🔧 Add actionlint configuration for the new preview runner labels

Changed:

• ⬆️ Upgrade default rmz version from 3.1.1 to 3.2.0 (fixes "Directory not empty" errors and improves performance on large flat directories; rm remains the default rm_cmd)
• ⚡ Parallelize folder removal when using rm (one rm per folder, up to nproc workers; rmz stays serial as it already parallelizes internally)
• 🔧 Run a single apt-get autoremove/clean pass at the end of the packages phase instead of one per package
• 🔧 Harden apt-get removals: non-interactive frontend, closed stdin, 600s timeout and visible output so a stalled removal can no longer hang a CI job silently
• 🚀 Update GitHub Actions to Node.js 24-compatible versions (actions/checkout@v7, actions/upload-artifact@v7, actions/download-artifact@v8, actions/upload-pages-artifact@v5, actions/deploy-pages@v5)
• 📚 Update README for the v4 release

Fixed:

• 🐛 Fix GitHub Pages deployment being skipped: correct the Pages build_type to workflow and evaluate the deploy job with always() plus an explicit needs result check
• 🐛 Fix ubuntu-26.04 matrix entries running without rm_cmd, which made those tests no-ops
• 🐛 Fix quoted package lists being passed to apt-get as a single package name