Add CI test for remote debugging on localhost

[Copilot]

This PR adds automated CI testing for remote debugging functionality by implementing tests that use lldb-server on localhost for ease of testing and CI integration.

Changes Made

GitHub Actions Workflow (.github/workflows/test.yml)

• Added CI workflow that runs on push/PR to dev and main branches
• Installs lldb on Ubuntu and sets up Python environment
• Tests remote debugging infrastructure by starting lldb-server gdbserver on localhost
• Validates GDB remote protocol communication with basic packet exchange
• Includes proper error handling and process cleanup

Unit Test Enhancement (test/debugger_test.py)

• Added test_remote_debug_localhost() method to existing test suite
• Tests the remote debugging infrastructure when Binary Ninja dependencies are available
• Follows existing test patterns with proper architecture support and skip conditions
• Uses dynamic port allocation to avoid conflicts in CI environments

Documentation (docs/ci-remote-debug-test.md)

• Documents the CI test implementation and purpose
• Provides manual testing instructions for developers
• Explains the test scope and validation approach

Test Coverage

The CI test validates that:

• lldb-server can start and listen on localhost
• Network connections to the debug server succeed
• Basic GDB remote protocol communication works correctly
• Process cleanup and resource management function properly

This provides a foundation for testing remote debugging changes without requiring complex multi-machine setups, making it easier to catch regressions in the remote debugging functionality.

Fixes #805.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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