Add conversion method for Addr

[masa-koz]

Description

This pull request includes significant changes to the src/lib.rs file and updates to the Cargo.toml file to improve the handling of socket addresses and address families. The most important changes include the addition of new dependencies, the removal of redundant structures, and the introduction of new methods for address conversion and retrieval.

Dependency Updates:

• Added socket2 crate to Cargo.toml for enhanced socket address handling.

Code Refactoring and Improvements:

• Replaced our own sockaddr_in and sockaddr_in6 structures with c_types::sockaddr_in and c_types::sockaddr_in6 .
• Added methods to the Addr union for converting to and from std::net::SocketAddr, and for retrieving port numbers.
• Implemented get_local_addr and get_remote_addr methods in the Connection struct to retrieve local and remote addresses.

Event Handling Enhancements:

• Updated the test_conn_callback function to print local and remote addresses upon connection.

Testing

cargo test

Documentation

TBD

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.66%. Comparing base (f8e9cec) to head (150f9b6).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4716      +/-   ##
==========================================
- Coverage   86.90%   86.66%   -0.25%     
==========================================
  Files          56       56              
  Lines       17363    17363              
==========================================
- Hits        15090    15048      -42     
- Misses       2273     2315      +42     

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