ci: add workflow for cleaning up GHCR images #2
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This pull request introduces automated cleanup processes for Docker images, both locally and in the GitHub Container Registry (GHCR), to help manage disk usage and keep only the most recent images. It adds scripts for local and remote cleanup, a new GitHub Actions workflow for GHCR cleanup, and updates the documentation to explain these maintenance tools.
scripts/cleanup-local-docker-images.sh, a script to clean up old local Docker images, keeping only the latest base and runtime images. Supports dry-run and force options for safety.scripts/cleanup-ghcr-images.sh, a script for removing older images from GHCR using the GitHub CLI, with options for dry-run, force, and controlling the number of versions to keep..github/workflows/cleanup-ghcr.yml, a GitHub Actions workflow to automate GHCR image cleanup, supporting manual triggers and configurable options for safe deletion.CONTRIBUTING.mdwith a new section on Docker image maintenance, detailing how to use the cleanup scripts and workflow, their options, and the retention policy for images.