fix(py): align anonymous client API with httpx

[barjin]

Aligns anonymous client API (e.g. impit.get()) with httpx capabilities. Adds proxy tests to the JS version of the package.

closes #308

[Copilot]

Pull Request Overview

This PR adds HTTP proxy support and a streaming API to both the Python and Node.js implementations of Impit. It bumps the version from 0.7.3 to 0.8.0 for Python and includes related dependency updates.

Key changes:

• Adds HTTP proxy support alongside existing SOCKS proxy support for both Python and Node.js
• Introduces a new stream() function for Python's client-less API
• Extends client-less API functions with proxy, follow_redirects, max_redirects, cookie_jar, and cookies parameters
• Adds proxy server testing infrastructure using pproxy (Python) and proxy-chain (Node.js)

Reviewed Changes

Copilot reviewed 11 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
impit-python/uv.lock	Updates package versions (0.7.3 → 0.8.0) and adds pproxy 2.7.9 dependency; updates exceptiongroup typing-extensions marker
impit-python/test/setup_proxy.py	New utility module for starting/stopping pproxy test server
impit-python/test/no_client_test.py	New comprehensive test suite for client-less API including proxy, redirects, cookies, and streaming
impit-python/test/basic_client_test.py	Adds HTTP proxy test case for Client class
impit-python/test/async_client_test.py	Adds HTTP proxy test case for AsyncClient class
impit-python/src/lib.rs	Implements new stream() function and extends client-less API functions with proxy/redirect/cookie parameters
impit-python/python/impit/impit.pyi	Adds type stubs for new stream() function and extended parameters on client-less API functions
impit-python/python/impit/init.py	Exports new stream function
impit-python/pyproject.toml	Adds pproxy>=2.7.9 dev dependency and mypy ignore configuration for pproxy
impit-node/yarn.lock	Updates package versions to 0.7.0 and adds proxy-chain 2.5.9 dependency
impit-node/test/mock.server.ts	Adds runProxyServer utility for testing HTTP proxy functionality
impit-node/test/basics.test.ts	Extends proxy tests to include HTTP proxy alongside SOCKS4/5
impit-node/package.json	Adds proxy-chain dev dependency and reorders optionalDependencies alphabetically

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Missing semicolon at the end of the statement.

Suggested change

	await getProxyServer()
	await getProxyServer();

[Copilot]

Module 'impit' is imported with both 'import' and 'import from'.

Suggested change

from impit import Cookies, StreamClosed, StreamConsumed, TooManyRedirects