feat: add support for Request / Response progress

[picunada]

🔗 Linked issue

Issue #45

❓ 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

Added support for Request / Response progress.

📝 Checklist

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

[codecov]

Codecov Report

Merging #277 (e8af744) into main (da64d78) will increase coverage by 1.10%.
The diff coverage is 96.82%.

❗ Current head e8af744 differs from pull request most recent head 12c07f1. Consider uploading reports for the commit 12c07f1 to get more accurate results

@@            Coverage Diff             @@
##             main     #277      +/-   ##
==========================================
+ Coverage   92.00%   93.10%   +1.10%     
==========================================
  Files           5        5              
  Lines         450      609     +159     
  Branches      102      109       +7     
==========================================
+ Hits          414      567     +153     
- Misses         36       42       +6     

Files	Coverage Δ
src/fetch.ts	96.50% <96.82%> (+1.10%)	⬆️

... and 3 files with indirect coverage changes

[picunada]

Hello, I would like to request help for this PR.

For now I only implemented progress for req/response with json.

First commit here working probably only within Browser env.
How can I add support for Node streams?
Also requesting refactor advices :)

[pi0]

Hi dear @picunada thanks for picking on this and nice idea for initial POC.

I think in order to move this idea forward, i am mainly looking forward to exposing minimum enough hooks in order to be able creating fetchWithProgrsss utility by wrapping $fetch, this way we can both make sure not adding overhead to the core and also implement platform dependent implementations. Also we could directly support a binary transform to allow all kind of responses. Not sure how we can wrap native utils such as response.formData() (one idea might be wrapping Response)

Basically what am i looking forward for next steps is to somehow introduce something like TrackedRequest / TrackedResponse wrapper classes. They might make this feature complete