Killport v1

[jkfran]

This PR introduces significant enhancements to the killport command-line tool. It adds new features such as mode-specific operations and expanded signal handling capabilities, along with the introduction of verbosity controls and a dry-run option. These changes aim to increase the flexibility and usability of killport for developers and system administrators who manage processes and containers via port assignments.

Key Features Added:

• Mode Selection: Users can now specify whether to target processes, containers, or both. This is controlled via the -m/--mode option. (#6 )
• Signal Specification: The tool now supports specifying many different signals to be sent to processes or containers, enhancing the control users have over how they terminate these entities.
• Dry Run Option: This new feature allows users to simulate termination commands to see which processes or containers would be affected without actually performing the kill operation. (#26 )

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Current Limitations:

• Platform Support: The enhancements are currently available only for macOS. Support for Linux is under development and will be released soon. Windows support is planned and will be addressed in a separate PR to ensure stability and compatibility across different system configurations.

Upcoming Updates:

• Linux Compatibility: We are working diligently to bring these new features to Linux. This will allow a broader user base to benefit from the updates.
• Windows Support: Windows compatibility is in the planning stage, and we aim to release it as a dedicated update to ensure that the tool meets the specific needs and configurations of Windows users.