feat: add a to_dict method in headers class

[sansyrox]

Description

This PR fixes #1099

Summary

This PR adds a to_dict method in the headers

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Name	Status	Preview	Comments	Updated (UTC)
robyn	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 16, 2025 6:09pm

[recurseml]

✨ No issues found! Your code is sparkling clean! ✨

[codspeed-hq]

CodSpeed Performance Report

Merging #1184 will not alter performance

_{Comparing feat/add-to-dict (d0b2f02) with main (ab90a23)}

Summary

✅ 138 untouched benchmarks

[thePromger]

Can we like this too?

req.headers.get_headers().get("key", "default_value")?

# Also, like this too
req.headers.get("content-type", "text")
If have this key then it will return value else, it will return text as value

Do add functionality in .get method of headers, query_params, etc where it can accept default value too

@sansyrox

[sansyrox]

@k4976 , the headers api will need an overhaul from ground 0 tbh. I don't like it a lot atp. Could you open a new issue?

[thePromger]

@k4976 , the headers api will need an overhaul from ground 0 tbh. I don't like it a lot atp. Could you open a new issue?

Should I create different issues for headers, query params, etc?

What should be the title?

[sansyrox]

@k4976 , something refactor headers api

[thePromger]

@sansyrox
Do clean up the commit history
This PR had taken our old prune commits from main branch