- Introduced support for SOCKS5 and SOCKS5H proxies in ACLK communication.
- Enhanced proxy negotiation logic for more robust handling of HTTP and SOCKS proxy connections.
- Improved memory handling for sensitive data like proxy credentials.
- Updated related documentation with detailed explanations on proxy support and configuration.

…ion.

- Eliminated redundant proxy-specific conditionals and payloads.

- Replace `freez` with `aclk_sensitive_free` for proxy passwords.
- Enhance SOCKS5/SOCKS5H proxy negotiation logic with proper cleanup handling.
- Address scenarios with and without proxy credentials for HTTP proxy connections.
- Update error codes and logs to better reflect proxy negotiation failures.
- Improve documentation to clarify SOCKS5/SOCKS5H proxy support and security considerations.