[CI] Add Label Commenter

[sandramsc]

Current Behavior

Copy/paste this workflow and this configuration into the .github folder, so that this repo will also have an automated commenter.

Desired Behavior

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Resources

Alternatives / Additional Context

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Contributor Resources

• See the Contributing to getnighthawk.dev Website
• See the Project Site section of GetNighthawk project doc
• 🎨 Wireframes and designs for Nighthawk Site in Figma
• Meshery UI Nighthawk (Performance) in Figma
• 🙋🏾🙋🏼 Questions: Layer5 Discussion Forum and Layer5 Community Slack