Add on_complete event handler to trigger actions after argument parsing completes
Move grep logic to separate function and register it as a completion callback
Update argument getters and help text generation to be const methods
Implement parser traits for vector<int> and vector<string> to handle comma-separated values
Add corresponding argument handling in main to demonstrate usage
Add support for handling Point type arguments in the argument parser. The change includes adding a new point argument and corresponding output handling in main.
- Add new template method for argument addition with type
- Handle optional values more safely in get_optional
- Remove commented test code from main.cpp
Simplify action handling by introducing a polymorphic base class for actions
Remove std::variant usage and improve type safety with proper cloning
Clean up unused includes and test code in main.cpp
Implement platform-specific parsers for Windows, Linux, and macOS
Add GNU argument convention implementations
Create fake parser for testing purposes
Update CMakeLists to include new headers
