Add Dev Container features by sliekens

[sliekens]

What type of PR is this?

• Add a new dev container collection
• Update to an existing dev container collection
• Documentation/spec update
• Other containers.dev site update (UX, layout, etc)

Related Issues

• Related Issue #
• Closes #

Description

https://github.com/sliekens/devcontainer-features

Hopefully somebody finds them useful. I got features for most of the big AI tools (Copilot, Codex, Claude, OpenCode), Ansible, Bitwarden, Aspire, Mono, GitHub CLI, Gitea CLI, and more to come based on my personal interests and spare time.

Collection checklist

If your PR contributes a new collection, please utilize this checklist:

• Collection name
• Maintainer name
• Maintainer contact link (i.e. link to a GitHub repo, email)
• Repository URL
• OCI Reference (must be the collection root, e.g. ghcr.io/<owner>/<repo> — one entry per repository, not one per Feature; do not include http:// or https://)
• I acknowledge that this collection provides new functionality, distinct from the existing collections part of this index.

[Copilot]

Pull request overview

Adds a new entry to the dev container collection index for “Dev Container features by sliekens”, making the collection discoverable via the repository’s central index.

Changes:

• Add a new collection entry for sliekens/devcontainer-features to the collection index.
• Include maintainer, contact, repository URL, and OCI reference for the new collection.

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