update devcontainer

[pstjohn]

Adds gh and tmux to the devcontainer

[coderabbitai]

Important

Review skipped

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⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: a25c4852-34fb-4b32-833a-b5a18a785ca0

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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