feat: add Request and Url objects constructors to enable easier testing

[IdoKendo]

Description

This PR fixes #574 by exposing Url and Request's new methods from rust to the python API, thus allowing developers to create them in tests in order to build unit tests that don't require starting a server.

[netlify]

👷 Deploy request for robyn pending review.

Visit the deploys page to approve it

Name	Link
🔨 Latest commit	df24a40

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
robyn	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 6, 2023 8:45pm

[codspeed-hq]

CodSpeed Performance Report

Merging #630 will not alter performance

_{Comparing IdoKendo:feat/add-constructors-for-testing (df24a40) with main (82e12a7)}

Summary

✅ 106 untouched benchmarks

[sansyrox]

I love how we are improving testability. GG @IdoKendo 🔥

[IdoKendo]

I love how we are improving testability. GG @IdoKendo 🔥

Yeah, it's really important IMO! By the way, I'm noticing the macOS integration tests are a bit flaky... Any idea what could be the cause?

[sansyrox]

@IdoKendo , a good solution would be not to depend on network calls this much and to have a proper testing client 😅

But one reason could be that we are spawning and killing multiple processes very frequently.

[IdoKendo]

@IdoKendo , a good solution would be not to depend on network calls this much and to have a proper testing client 😅

But one reason could be that we are spawning and killing multiple processes very frequently.

Yeah, I guess once the testing client PR will be merged we can create a more resilient testing suite.

[sansyrox]

LGTM 😄