Docs & Ergonomics

[0xAlcibiades]

This pull request includes several updates and improvements across multiple files, focusing on dependency updates, error handling, and enhancements to HTTP/2 settings.

Dependency Updates:

• Updated dependencies in Cargo.toml to newer versions, including async-stream, bytes, futures, http, hyper, rustls, tokio, and others.

Error Handling:

• Added a new function handle_accept_error in src/error.rs to manage errors during connection acceptance, categorizing them as fatal or non-fatal.
• Refactored src/tcp.rs to use the new handle_accept_error function from src/error.rs.

HTTP/2 Enhancements:

• Modified HTTP/2 settings in benches/hello_world_tower_hyper_tls_tcp.rs to improve performance and reliability, including changes to window sizes, frame size, and keep-alive settings.
• Updated HTTP/2 configuration in src/http.rs to match the new settings for better throughput and connection management.

Code Documentation:

• Added detailed documentation to src/io.rs, explaining the purpose and usage of the Transport enum and its methods.

Miscellaneous:

• Added a comment in src/lib.rs regarding the optional use of Jemalloc as an alternative global allocator.

[codecov]

Codecov Report

Attention: Patch coverage is 91.27273% with 24 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/tcp.rs	79.81%	22 Missing ⚠️
src/error.rs	92.85%	1 Missing ⚠️
src/tls.rs	99.23%	1 Missing ⚠️

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