feat(cookie): retrieve all cookies from the cookie jar

[0x676e67]

close: #235

[Copilot]

Pull Request Overview

This PR adds functionality to retrieve all cookies from a cookie jar by implementing a get_all() method. The changes include switching from cookie_crate::Cookie to cookie_store::RawCookie for better compatibility with the cookie store operations.

• Added get_all() method to the Jar class to retrieve all stored cookies
• Refactored cookie handling to use RawCookie instead of cookie_crate::Cookie
• Updated all cookie-related methods to use Python's allow_threads for better concurrency

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 4 comments.

File	Description
src/cookie.rs	Implements the core get_all() functionality and refactors cookie type usage
python/rnet/cookie.pyi	Adds type hint for the new get_all() method
tests/cookie_test.py	Adds comprehensive test coverage for the new get_all() functionality