perf(http): Optimize the overhead of boundary checks for streaming types

[0x676e67]

This pull request includes several important changes to improve the handling of asynchronous streaming and simplify the codebase. The main changes involve updating the Client and Response classes, as well as renaming and refactoring files.

Asynchronous Streaming Improvements:

• examples/stream.py: Updated the main function to use an asynchronous context manager for streaming.
• rnet.pyi: Added __aenter__ and __aexit__ methods to the Streamer class to support asynchronous context management.

Codebase Simplification:

• src/client.rs: Simplified the Client implementation by removing redundant calls to pyo3_async_runtimes::tokio::future_into_py and replacing them with future_into_py. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
• src/response/http/mod.rs: Renamed from src/response/http.rs and refactored to remove the Streamer class definition, moving it to a separate stream module. Updated the Response class methods to use future_into_py for asynchronous operations. [1] [2] [3] [4] [5] [6] [7] [8]

Dependency Updates:

• Cargo.toml: Added the bytes dependency.

Import Adjustments:

• src/client.rs: Added import for pyo3_async_runtimes::tokio::future_into_py.…sponse types