Add devcontainer features by iyaki to collection

[iyaki]

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

None

Description

Add devcontainer features by iyaki to collection

Collection checklist

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

• Collection name: Devcontainer features by iyaki
• Maintainer name: iyaki
• Maintainer contact link: https://github.com/iyaki/devcontainer-features/issues
• Repository URL: https://github.com/iyaki/devcontainer-features
• OCI Reference: ghcr.io/iyaki/devcontainer-features
• I acknowledge that this collection provides new functionality, distinct from the existing collections part of this index.