- Added support for ROS2 message types in aimrt_py, improving interoperability with ROS2 systems.
- Introduced new module aimrt_python_runtime_ros2 for ROS2-specific functionalities, including publishing, subscribing, and RPC handling.
- Updated existing files to integrate ROS2 capabilities, ensuring seamless interaction between ROS1 and ROS2 message types.
- Enhanced CMake configuration to conditionally include ROS2 components based on build settings.
- Improved code organization by separating ROS2-related functionalities into dedicated headers and source files for better maintainability.

…arity and organization

- Added 'test_log/' to .gitignore to exclude test log files from version control.
- Removed obsolete 'py_tests.py' file to streamline the test structure.
- Enhanced logging messages in ROS2 subscriber and RPC server applications for better context clarity.
- Updated expected output definitions in utility files to reflect new message structures and improve consistency.
- Refactored example runner script to correct directory path handling and improve readability.
- Added new example configurations for ROS2 channels and RPC interactions, enhancing the testing framework.

- Eliminated the import of aimrt_python_runtime_ros2 from the __init__.py file in the python_runtime module to streamline the code and improve clarity.

…ation

- Removed direct import of aimrt_python_runtime_ros2 in favor of aliasing for clarity in aimrt_py_chn.py.
- Updated CMakeLists.txt to conditionally add dependencies for ROS2 components, improving build flexibility.
- Adjusted ROS2 service generation script to utilize the aliased import for better readability and maintainability.

- Introduced a new subprocess call in `run_all_example.py` to execute the `build_examples_py_ros2_rpc.sh` script, enhancing the example runner's capabilities for ROS2 RPC interactions.
- This addition allows for better demonstration and testing of ROS2 functionalities within the example framework.