feat: polyfill `node:diagnostics_channel` module

[jculvey]

🔗 Linked issue

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [x] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Adds a polyfill for the node:diagnostics_channel module.

📝 Checklist

• [ ] I have linked an issue or discussion.
• [ ] I have updated the documentation accordingly.

[jculvey]

I might be missing something here, but it seems that this PR is unnecessary for Cloudflare.

aww shucks 🤦 .

I overlooked the fact that this was included in workerd. My thought process here was that I started working on dgram, and realized it had a dependency on diagnostics_channel, so I decided to pick that up first thinking it needed to be done.

🤷

[IgorMinar]

hahaha.. I see. oops. 🤣

well, let's have @pi0 take a look at this one and see if he likes it. I think it's a good addition to nodeless preset, but as we know it won't be used with workerd.

[pi0]

Thanks!