feat(client): adapt overriding domain name resolution address

[0x676e67]

close: #352

[Copilot]

Pull Request Overview

This PR implements DNS domain name resolution address overriding functionality, allowing users to specify custom IP addresses for domain names that bypass normal DNS resolution.

• Added a new resolve_to_addrs parameter to the Client constructor for overriding DNS resolution
• Implemented extractor logic to handle Python dictionary mappings from domain names to IP addresses
• Created test coverage and example usage demonstrating the DNS override feature

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/dns_test.py	Adds test case verifying DNS override functionality by expecting connection failure to a local IP
src/extractor.rs	Implements extractor for converting Python dict to DNS resolution mappings
src/client/mod.rs	Integrates DNS override parameter into client builder and reorganizes method implementations
python/rnet/init.pyi	Updates type definitions to include the new resolve_to_addrs parameter
python/examples/dns_override.py	Provides example usage of the DNS override feature
README.md	Minor reordering of feature list items

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