Add weslyg devcontainer feature repository

[WeslyG]

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)

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Description

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Collection checklist

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• Collection name
• Maintainer name
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• I acknowledge that this collection provides new functionality, distinct from the existing collections part of this index.

[samruddhikhandale]

Hi 👋

Can you help change the visibility of your Feature packages to public? Looks like it's private, see https://github.com/WeslyG?tab=packages&repo_name=features as I'd expect hashicorp-mirror package to exist.

Feel free to look at https://containers.dev/guide/author-a-feature#publishing for information.