feat(proxy): add Unix socket proxy support

[0x676e67]

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[Copilot]

Pull Request Overview

This PR adds support for Unix domain socket connections to the HTTP client, enabling communication through local sockets instead of TCP/IP. This is particularly useful for communicating with services like Docker daemon or other local services that expose APIs over Unix sockets.

Key changes include:

• Implementation of Unix socket connection support with UnixConnector and related types
• Extension of client builder and request builder APIs to accept Unix socket paths
• TLS support over Unix domain sockets for secure local communication

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/core/client/service/meta.rs	Adds Unix socket options accessor to connection metadata
src/core/client/options/mod.rs	Extends request options to include Unix connection configuration
src/core/client/connect/uds.rs	Implements core Unix domain socket connector functionality
src/core/client/connect/mod.rs	Exports Unix socket types and reorganizes module structure
src/client/request.rs	Adds unix_socket() method to request builder API
src/client/http/mod.rs	Integrates Unix socket support into main client configuration
src/client/http/connect/uds.rs	Provides ergonomic conversion trait for Unix socket paths
src/client/http/connect/tls_info.rs	Extends TLS info support for Unix streams
src/client/http/connect/mod.rs	Exposes Unix domain socket module
src/client/http/connect/connector.rs	Core connector logic for Unix socket connections with TLS
src/client/http/connect/conn.rs	Connection trait implementations for Unix streams
examples/unix_socket.rs	Demonstrates Unix socket usage with Docker API

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