feat(node, cloudflare): cleanup `globalThis.process` + add hybrid cloudflare impl

[IgorMinar]

This PR makes several related changes to how polyfilling of globalThis.process works:

• the inject setting in nodeless and cloudflare presets points to side-effect-free implementation
• the polyfill setting in nodeless preset is side-effecty and doesn't have any exports
• I refactored the code to use globalThis directly rather than via globaThis.ts as globalThis is now widely supported and doesn't need to be polyfilled
• I introduced src/runtime/node/process.ts following the precedence of src/runtime/node/global.ts
• I improved type-safety of the files I touched

🔗 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)
• [ ] ✨ 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

📝 Checklist

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

[IgorMinar]

@pi0 updated. PTAL